25891625 has 16 divisors (see below), whose sum is σ = 32642688. Its totient is φ = 20502000.

The previous prime is 25891597. The next prime is 25891627. The reversal of 25891625 is 52619852.

It is not a de Polignac number, because 25891625 - 2¹² = 25887529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25891627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11870 + ... + 13880.

It is an arithmetic number, because the mean of its divisors is an integer number (2040168).

Almost surely, 2^25891625 is an apocalyptic number.

25891625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25891625 is a deficient number, since it is larger than the sum of its proper divisors (6751063).

25891625 is a wasteful number, since it uses less digits than its factorization.

25891625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129 (or 2119 counting only the distinct ones).

The product of its digits is 43200, while the sum is 38.

The square root of 25891625 is about 5088.3813732856. The cubic root of 25891625 is about 295.8374175636.

The spelling of 25891625 in words is "twenty-five million, eight hundred ninety-one thousand, six hundred twenty-five".