257601972 has 12 divisors (see below), whose sum is σ = 601071296. Its totient is φ = 85867320.

The previous prime is 257601961. The next prime is 257601979. The reversal of 257601972 is 279106752.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 257601972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257601979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10733404 + ... + 10733427.

Almost surely, 2^257601972 is an apocalyptic number.

It is an amenable number.

257601972 is an abundant number, since it is smaller than the sum of its proper divisors (343469324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257601972 is a wasteful number, since it uses less digits than its factorization.

257601972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21466838 (or 21466836 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 257601972 is about 16049.9835513934. The cubic root of 257601972 is about 636.2821322530.

The spelling of 257601972 in words is "two hundred fifty-seven million, six hundred one thousand, nine hundred seventy-two".