257161404 has 12 divisors (see below), whose sum is σ = 600043304. Its totient is φ = 85720464.

The previous prime is 257161403. The next prime is 257161417. The reversal of 257161404 is 404161752.

257161404 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×257161404² = 132263975414502432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257161403) 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, 10715047 + ... + 10715070.

Almost surely, 2^257161404 is an apocalyptic number.

It is an amenable number.

257161404 is an abundant number, since it is smaller than the sum of its proper divisors (342881900).

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

257161404 is a wasteful number, since it uses less digits than its factorization.

257161404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21430124 (or 21430122 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 257161404 is about 16036.2528041934. The cubic root of 257161404 is about 635.9191879443.

The spelling of 257161404 in words is "two hundred fifty-seven million, one hundred sixty-one thousand, four hundred four".