257263427 has 4 divisors (see below), whose sum is σ = 257665416. Its totient is φ = 256861440.

The previous prime is 257263411. The next prime is 257263471. The reversal of 257263427 is 724362752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 257263427 - 2⁴ = 257263411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257260427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200033 + ... + 201314.

It is an arithmetic number, because the mean of its divisors is an integer number (64416354).

Almost surely, 2^257263427 is an apocalyptic number.

257263427 is a deficient number, since it is larger than the sum of its proper divisors (401989).

257263427 is an equidigital number, since it uses as much as digits as its factorization.

257263427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401988.

The product of its digits is 141120, while the sum is 38.

The square root of 257263427 is about 16039.4334999713. The cubic root of 257263427 is about 636.0032723682.

The spelling of 257263427 in words is "two hundred fifty-seven million, two hundred sixty-three thousand, four hundred twenty-seven".