257161403 has 2 divisors, whose sum is σ = 257161404. Its totient is φ = 257161402.

The previous prime is 257161391. The next prime is 257161417. The reversal of 257161403 is 304161752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257161403 - 2²⁰ = 256112827 is a prime.

It is a super-2 number, since 2×257161403² = 132263974385856818, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (257161423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128580701 + 128580702.

It is an arithmetic number, because the mean of its divisors is an integer number (128580702).

Almost surely, 2^257161403 is an apocalyptic number.

257161403 is a deficient number, since it is larger than the sum of its proper divisors (1).

257161403 is an equidigital number, since it uses as much as digits as its factorization.

257161403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 257161403 is about 16036.2527730140. The cubic root of 257161403 is about 635.9191871200.

The spelling of 257161403 in words is "two hundred fifty-seven million, one hundred sixty-one thousand, four hundred three".