257159146 has 4 divisors (see below), whose sum is σ = 385738722. Its totient is φ = 128579572.

The previous prime is 257159131. The next prime is 257159209. The reversal of 257159146 is 641951752.

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., 185096025 + 72063121 = 13605^2 + 8489^2 .

It is a super-2 number, since 2×257159146² = 132261652742898632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257159099 and 257159108.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64289785 + ... + 64289788.

Almost surely, 2^257159146 is an apocalyptic number.

257159146 is a deficient number, since it is larger than the sum of its proper divisors (128579576).

257159146 is a wasteful number, since it uses less digits than its factorization.

257159146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128579575.

The product of its digits is 75600, while the sum is 40.

The square root of 257159146 is about 16036.1824010579. The cubic root of 257159146 is about 635.9173267141.

The spelling of 257159146 in words is "two hundred fifty-seven million, one hundred fifty-nine thousand, one hundred forty-six".