257757425 has 6 divisors (see below), whose sum is σ = 319619238. Its totient is φ = 206205920.

The previous prime is 257757403. The next prime is 257757427. The reversal of 257757425 is 524757752.

It can be written as a sum of positive squares in 3 ways, for example, as 45064369 + 212693056 = 6713^2 + 14584^2 .

It is not a de Polignac number, because 257757425 - 2⁸ = 257757169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257757427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5155124 + ... + 5155173.

It is an arithmetic number, because the mean of its divisors is an integer number (53269873).

Almost surely, 2^257757425 is an apocalyptic number.

257757425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

257757425 is a deficient number, since it is larger than the sum of its proper divisors (61861813).

257757425 is a wasteful number, since it uses less digits than its factorization.

257757425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10310307 (or 10310302 counting only the distinct ones).

The product of its digits is 686000, while the sum is 44.

The square root of 257757425 is about 16054.8255985545. The cubic root of 257757425 is about 636.4100972108.

The spelling of 257757425 in words is "two hundred fifty-seven million, seven hundred fifty-seven thousand, four hundred twenty-five".