257064751 has 2 divisors, whose sum is σ = 257064752. Its totient is φ = 257064750.

The previous prime is 257064749. The next prime is 257064763. The reversal of 257064751 is 157460752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257064751 - 2¹ = 257064749 is a prime.

Together with 257064749, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 257064751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257064781) 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, 128532375 + 128532376.

It is an arithmetic number, because the mean of its divisors is an integer number (128532376).

Almost surely, 2^257064751 is an apocalyptic number.

257064751 is a deficient number, since it is larger than the sum of its proper divisors (1).

257064751 is an equidigital number, since it uses as much as digits as its factorization.

257064751 is an odious number, because the sum of its binary digits is odd.

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

The square root of 257064751 is about 16033.2389428961. The cubic root of 257064751 is about 635.8395088035.

The spelling of 257064751 in words is "two hundred fifty-seven million, sixty-four thousand, seven hundred fifty-one".