25632641 has 4 divisors (see below), whose sum is σ = 25941552. Its totient is φ = 25323732.

The previous prime is 25632631. The next prime is 25632661. The reversal of 25632641 is 14623652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25632641 - 2¹⁴ = 25616257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25632631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154331 + ... + 154496.

It is an arithmetic number, because the mean of its divisors is an integer number (6485388).

Almost surely, 2^25632641 is an apocalyptic number.

It is an amenable number.

25632641 is a deficient number, since it is larger than the sum of its proper divisors (308911).

25632641 is an equidigital number, since it uses as much as digits as its factorization.

25632641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308910.

The product of its digits is 8640, while the sum is 29.

The square root of 25632641 is about 5062.8688507604. The cubic root of 25632641 is about 294.8477275999.

The spelling of 25632641 in words is "twenty-five million, six hundred thirty-two thousand, six hundred forty-one".