4242 = 2 x 3 x 7 x 101. It has exactly four distinct palindromic prime factors. It is also a multiple of 7 containing only even digits.
4242 is a divisor of 4120 - 1.
4242 is a number n such that it is a multiple of 7 and n - 1 and n + 1 are twin primes.
4242 is the number of partitions of 32 into at most 10 parts.
4242 is the number of distinct walks of length 2n on a cubic lattice, starting and finishing at the origin and staying in the first (nonnegative) octant, for n = 5.
NGC 4242 is a spiral galaxy in the constellation Canes Venatici.