257370425 has 12 divisors (see below), whose sum is σ = 343688940. Its totient is φ = 190057920.

The previous prime is 257370419. The next prime is 257370427. The reversal of 257370425 is 524073752.

It can be written as a sum of positive squares in 6 ways, for example, as 2999824 + 254370601 = 1732^2 + 15949^2 .

It is not a de Polignac number, because 257370425 - 2¹⁸ = 257108281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257370427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 395630 + ... + 396279.

It is an arithmetic number, because the mean of its divisors is an integer number (28640745).

Almost surely, 2^257370425 is an apocalyptic number.

257370425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

257370425 is a deficient number, since it is larger than the sum of its proper divisors (86318515).

257370425 is a wasteful number, since it uses less digits than its factorization.

257370425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791932 (or 791927 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 35.

The square root of 257370425 is about 16042.7686201603. The cubic root of 257370425 is about 636.0914331648.

The spelling of 257370425 in words is "two hundred fifty-seven million, three hundred seventy thousand, four hundred twenty-five".