257534401 has 4 divisors (see below), whose sum is σ = 258413652. Its totient is φ = 256655152.

The previous prime is 257534383. The next prime is 257534441. The reversal of 257534401 is 104435752.

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

It can be written as a sum of positive squares in 2 ways, for example, as 217592001 + 39942400 = 14751^2 + 6320^2 .

It is a cyclic number.

It is not a de Polignac number, because 257534401 - 2⁵ = 257534369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257534441) 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, 439186 + ... + 439771.

It is an arithmetic number, because the mean of its divisors is an integer number (64603413).

Almost surely, 2^257534401 is an apocalyptic number.

It is an amenable number.

257534401 is a deficient number, since it is larger than the sum of its proper divisors (879251).

257534401 is an equidigital number, since it uses as much as digits as its factorization.

257534401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879250.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 257534401 is about 16047.8783956011. The cubic root of 257534401 is about 636.2264934712.

The spelling of 257534401 in words is "two hundred fifty-seven million, five hundred thirty-four thousand, four hundred one".