23621425 has 6 divisors (see below), whose sum is σ = 29290598. Its totient is φ = 18897120.

The previous prime is 23621387. The next prime is 23621443. The reversal of 23621425 is 52412632.

It can be written as a sum of positive squares in 3 ways, for example, as 30976 + 23590449 = 176^2 + 4857^2 .

It is not a de Polignac number, because 23621425 - 2⁹ = 23620913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 944857 = 23621425 / (2 + 3 + 6 + 2 + 1 + 4 + 2 + 5).

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 23621425.

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 5 ways as a sum of consecutive naturals, for example, 472404 + ... + 472453.

Almost surely, 2^23621425 is an apocalyptic number.

23621425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23621425 is a deficient number, since it is larger than the sum of its proper divisors (5669173).

23621425 is an equidigital number, since it uses as much as digits as its factorization.

23621425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944867 (or 944862 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 23621425 is about 4860.1877535750. The cubic root of 23621425 is about 286.9252031853.

The spelling of 23621425 in words is "twenty-three million, six hundred twenty-one thousand, four hundred twenty-five".