257025625 has 10 divisors (see below), whose sum is σ = 321180002. Its totient is φ = 205620000.

The previous prime is 257025623. The next prime is 257025661. The reversal of 257025625 is 526520752.

It can be written as a sum of positive squares in 5 ways, for example, as 67026969 + 189998656 = 8187^2 + 13784^2 .

It is not a de Polignac number, because 257025625 - 2¹ = 257025623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257025623) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 204996 + ... + 206245.

Almost surely, 2^257025625 is an apocalyptic number.

257025625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

257025625 is a deficient number, since it is larger than the sum of its proper divisors (64154377).

257025625 is an frugal number, since it uses more digits than its factorization.

257025625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411261 (or 411246 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 257025625 is about 16032.0187437515. The cubic root of 257025625 is about 635.8072482948.

The spelling of 257025625 in words is "two hundred fifty-seven million, twenty-five thousand, six hundred twenty-five".