25428625 has 8 divisors (see below), whose sum is σ = 31735080. Its totient is φ = 20342800.

The previous prime is 25428607. The next prime is 25428629. The reversal of 25428625 is 52682452.

It can be written as a sum of positive squares in 4 ways, for example, as 7033104 + 18395521 = 2652^2 + 4289^2 .

It is not a de Polignac number, because 25428625 - 2¹³ = 25420433 is a prime.

It is a super-2 number, since 2×25428625² = 1293229938781250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25428629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101590 + ... + 101839.

It is an arithmetic number, because the mean of its divisors is an integer number (3966885).

Almost surely, 2^25428625 is an apocalyptic number.

25428625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25428625 is a deficient number, since it is larger than the sum of its proper divisors (6306455).

25428625 is an equidigital number, since it uses as much as digits as its factorization.

25428625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203444 (or 203434 counting only the distinct ones).

The product of its digits is 38400, while the sum is 34.

The square root of 25428625 is about 5042.6803388674. The cubic root of 25428625 is about 294.0633896974.

The spelling of 25428625 in words is "twenty-five million, four hundred twenty-eight thousand, six hundred twenty-five".