25777625 has 8 divisors (see below), whose sum is σ = 32170632. Its totient is φ = 20622000.

The previous prime is 25777613. The next prime is 25777637. The reversal of 25777625 is 52677752.

It is an interprime number because it is at equal distance from previous prime (25777613) and next prime (25777637).

It can be written as a sum of positive squares in 4 ways, for example, as 52441 + 25725184 = 229^2 + 5072^2 .

It is not a de Polignac number, because 25777625 - 2⁸ = 25777369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102986 + ... + 103235.

It is an arithmetic number, because the mean of its divisors is an integer number (4021329).

Almost surely, 2^25777625 is an apocalyptic number.

25777625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25777625 is a deficient number, since it is larger than the sum of its proper divisors (6393007).

25777625 is an equidigital number, since it uses as much as digits as its factorization.

25777625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206236 (or 206226 counting only the distinct ones).

The product of its digits is 205800, while the sum is 41.

The square root of 25777625 is about 5077.1670250249. The cubic root of 25777625 is about 295.4025911874.

The spelling of 25777625 in words is "twenty-five million, seven hundred seventy-seven thousand, six hundred twenty-five".