257607401 has 4 divisors (see below), whose sum is σ = 262467972. Its totient is φ = 252746832.

The previous prime is 257607397. The next prime is 257607419. The reversal of 257607401 is 104706752.

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 163226176 + 94381225 = 12776^2 + 9715^2 .

It is a cyclic number.

It is not a de Polignac number, because 257607401 - 2² = 257607397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257607421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2430206 + ... + 2430311.

It is an arithmetic number, because the mean of its divisors is an integer number (65616993).

Almost surely, 2^257607401 is an apocalyptic number.

It is an amenable number.

257607401 is a deficient number, since it is larger than the sum of its proper divisors (4860571).

257607401 is an equidigital number, since it uses as much as digits as its factorization.

257607401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4860570.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 257607401 is about 16050.1526784015. The cubic root of 257607401 is about 636.2866021352.

The spelling of 257607401 in words is "two hundred fifty-seven million, six hundred seven thousand, four hundred one".