257439161 has 16 divisors (see below), whose sum is σ = 307891200. Its totient is φ = 210461328.

The previous prime is 257439131. The next prime is 257439173. The reversal of 257439161 is 161934752.

It is a de Polignac number, because none of the positive numbers 2^k-257439161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257439101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58910 + ... + 63128.

It is an arithmetic number, because the mean of its divisors is an integer number (19243200).

Almost surely, 2^257439161 is an apocalyptic number.

It is an amenable number.

257439161 is a deficient number, since it is larger than the sum of its proper divisors (50452039).

257439161 is a wasteful number, since it uses less digits than its factorization.

257439161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628.

The product of its digits is 45360, while the sum is 38.

The square root of 257439161 is about 16044.9107507646. The cubic root of 257439161 is about 636.1480551705.

The spelling of 257439161 in words is "two hundred fifty-seven million, four hundred thirty-nine thousand, one hundred sixty-one".