25421875 has 14 divisors (see below), whose sum is σ = 31796468. Its totient is φ = 20325000.

The previous prime is 25421839. The next prime is 25421899. The reversal of 25421875 is 57812452.

It is a happy number.

It is not a de Polignac number, because 25421875 - 2¹¹ = 25419827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25421875.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 14812 + ... + 16438.

Almost surely, 2^25421875 is an apocalyptic number.

25421875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25421875 is a deficient number, since it is larger than the sum of its proper divisors (6374593).

25421875 is an frugal number, since it uses more digits than its factorization.

25421875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657 (or 1632 counting only the distinct ones).

The product of its digits is 22400, while the sum is 34.

The square root of 25421875 is about 5042.0110075247. The cubic root of 25421875 is about 294.0373677957.

The spelling of 25421875 in words is "twenty-five million, four hundred twenty-one thousand, eight hundred seventy-five".