257411263 has 4 divisors (see below), whose sum is σ = 272553120. Its totient is φ = 242269408.

The previous prime is 257411237. The next prime is 257411267. The reversal of 257411263 is 362114752.

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 257411263 - 2¹³ = 257403071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257411267) 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 in 3 ways as a sum of consecutive naturals, for example, 7570903 + ... + 7570936.

It is an arithmetic number, because the mean of its divisors is an integer number (68138280).

Almost surely, 2^257411263 is an apocalyptic number.

257411263 is a deficient number, since it is larger than the sum of its proper divisors (15141857).

257411263 is a wasteful number, since it uses less digits than its factorization.

257411263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15141856.

The product of its digits is 10080, while the sum is 31.

The square root of 257411263 is about 16044.0413549704. The cubic root of 257411263 is about 636.1250751138.

The spelling of 257411263 in words is "two hundred fifty-seven million, four hundred eleven thousand, two hundred sixty-three".