257212772 has 12 divisors (see below), whose sum is σ = 469693056. Its totient is φ = 123014760.

The previous prime is 257212751. The next prime is 257212807. The reversal of 257212772 is 277212752.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397804 + ... + 1397987.

It is an arithmetic number, because the mean of its divisors is an integer number (39141088).

Almost surely, 2^257212772 is an apocalyptic number.

It is an amenable number.

257212772 is a deficient number, since it is larger than the sum of its proper divisors (212480284).

257212772 is a wasteful number, since it uses less digits than its factorization.

257212772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2795818 (or 2795816 counting only the distinct ones).

The product of its digits is 27440, while the sum is 35.

The square root of 257212772 is about 16037.8543452670. The cubic root of 257212772 is about 635.9615267525.

The spelling of 257212772 in words is "two hundred fifty-seven million, two hundred twelve thousand, seven hundred seventy-two".