257555342 has 16 divisors (see below), whose sum is σ = 424535472. Its totient is φ = 116214720.

The previous prime is 257555339. The next prime is 257555371. The reversal of 257555342 is 243555752.

It is a junction number, because it is equal to n+sod(n) for n = 257555296 and 257555305.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39713 + ... + 45740.

It is an arithmetic number, because the mean of its divisors is an integer number (26533467).

Almost surely, 2^257555342 is an apocalyptic number.

257555342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

257555342 is a deficient number, since it is larger than the sum of its proper divisors (166980130).

257555342 is a wasteful number, since it uses less digits than its factorization.

257555342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85603.

The product of its digits is 210000, while the sum is 38.

The square root of 257555342 is about 16048.5308361856. The cubic root of 257555342 is about 636.2437375854.

The spelling of 257555342 in words is "two hundred fifty-seven million, five hundred fifty-five thousand, three hundred forty-two".