25612531 has 8 divisors (see below), whose sum is σ = 29328480. Its totient is φ = 21910848.

The previous prime is 25612519. The next prime is 25612537. The reversal of 25612531 is 13521652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25612531 - 2⁷ = 25612403 is a prime.

It is a super-2 number, since 2×25612531² = 1312003488451922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25612496 and 25612505.

It is not an unprimeable number, because it can be changed into a prime (25612537) by changing a digit.

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, 615 + ... + 7183.

It is an arithmetic number, because the mean of its divisors is an integer number (3666060).

Almost surely, 2^25612531 is an apocalyptic number.

25612531 is a deficient number, since it is larger than the sum of its proper divisors (3715949).

25612531 is an equidigital number, since it uses as much as digits as its factorization.

25612531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7133.

The product of its digits is 1800, while the sum is 25.

The square root of 25612531 is about 5060.8824329360. The cubic root of 25612531 is about 294.7706001708.

The spelling of 25612531 in words is "twenty-five million, six hundred twelve thousand, five hundred thirty-one".