1590

1590 = 2 x 3 x 5 x 53.

1590 is 818 in base 14 and 636 in base 16.

1590 is a heptadecagonal number (A051869).

1590 is a number n such that 2n + 1, 4n + 1, and 8n+ 1 are all primes (A124041).

1590 is the sum of eight nonzero 6th powers (A003364).

1590 divides 23⁴ - 1.

Source: OEIS

1379

1379 = 7 x 197.

Dropping any digit of 1379 gives a prime number (A034895).

1379 is the maximum number of regions into which 52 lines divide the plane. It is a central polygonal numbers (A000124).

1379 is a heptadecagonal number (A051869).

1379 is the magic constant of a 24 x 24 normal magic square.

1379 is 4010 in base 7 and 1044 in base 11. It is 2543 in base 8 and 707 in base 14.

1379 divides 36⁷ - 1.

Source: What's Special About This Number?