257450671 has 2 divisors, whose sum is σ = 257450672. Its totient is φ = 257450670.

The previous prime is 257450659. The next prime is 257450701. The reversal of 257450671 is 176054752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257450671 - 2⁵ = 257450639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257450671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257451671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128725335 + 128725336.

It is an arithmetic number, because the mean of its divisors is an integer number (128725336).

Almost surely, 2^257450671 is an apocalyptic number.

257450671 is a deficient number, since it is larger than the sum of its proper divisors (1).

257450671 is an equidigital number, since it uses as much as digits as its factorization.

257450671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 257450671 is about 16045.2694274668. The cubic root of 257450671 is about 636.1575356693.

It can be divided in two parts, 257450 and 671, that added together give a triangular number (258121 = T₇₁₈).

The spelling of 257450671 in words is "two hundred fifty-seven million, four hundred fifty thousand, six hundred seventy-one".