25266621 has 8 divisors (see below), whose sum is σ = 34016320. Its totient is φ = 16680672.

The previous prime is 25266613. The next prime is 25266707. The reversal of 25266621 is 12666252.

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

It is not a de Polignac number, because 25266621 - 2³ = 25266613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25266601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40576 + ... + 41193.

It is an arithmetic number, because the mean of its divisors is an integer number (4252040).

Almost surely, 2^25266621 is an apocalyptic number.

It is an amenable number.

25266621 is a deficient number, since it is larger than the sum of its proper divisors (8749699).

25266621 is a wasteful number, since it uses less digits than its factorization.

25266621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81875.

The product of its digits is 8640, while the sum is 30.

The square root of 25266621 is about 5026.5913897989. The cubic root of 25266621 is about 293.4375730021.

The spelling of 25266621 in words is "twenty-five million, two hundred sixty-six thousand, six hundred twenty-one".