257268146 has 4 divisors (see below), whose sum is σ = 385902222. Its totient is φ = 128634072.

The previous prime is 257268139. The next prime is 257268169. The reversal of 257268146 is 641862752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 211557025 + 45711121 = 14545^2 + 6761^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64317035 + ... + 64317038.

Almost surely, 2^257268146 is an apocalyptic number.

257268146 is a deficient number, since it is larger than the sum of its proper divisors (128634076).

257268146 is a wasteful number, since it uses less digits than its factorization.

257268146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128634075.

The product of its digits is 161280, while the sum is 41.

The square root of 257268146 is about 16039.5806054897. The cubic root of 257268146 is about 636.0071610944.

The spelling of 257268146 in words is "two hundred fifty-seven million, two hundred sixty-eight thousand, one hundred forty-six".