257004157 has 2 divisors, whose sum is σ = 257004158. Its totient is φ = 257004156.

The previous prime is 257004103. The next prime is 257004169. The reversal of 257004157 is 751400752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143496441 + 113507716 = 11979^2 + 10654^2 .

It is a cyclic number.

It is not a de Polignac number, because 257004157 - 2⁷ = 257004029 is a prime.

It is a super-2 number, since 2×257004157² = 132102273430561298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257004857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128502078 + 128502079.

It is an arithmetic number, because the mean of its divisors is an integer number (128502079).

Almost surely, 2^257004157 is an apocalyptic number.

It is an amenable number.

257004157 is a deficient number, since it is larger than the sum of its proper divisors (1).

257004157 is an equidigital number, since it uses as much as digits as its factorization.

257004157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 257004157 is about 16031.3491946249. The cubic root of 257004157 is about 635.7895459224.

The spelling of 257004157 in words is "two hundred fifty-seven million, four thousand, one hundred fifty-seven".