25861231 has 8 divisors (see below), whose sum is σ = 28472400. Its totient is φ = 23293440.

The previous prime is 25861219. The next prime is 25861247. The reversal of 25861231 is 13216852.

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 25861231 - 2⁹ = 25860719 is a prime.

It is a super-2 number, since 2×25861231² = 1337606537670722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25861231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25861211) 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, 9586 + ... + 11983.

It is an arithmetic number, because the mean of its divisors is an integer number (3559050).

Almost surely, 2^25861231 is an apocalyptic number.

25861231 is a deficient number, since it is larger than the sum of its proper divisors (2611169).

25861231 is a wasteful number, since it uses less digits than its factorization.

25861231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21689.

The product of its digits is 2880, while the sum is 28.

The square root of 25861231 is about 5085.3938883827. The cubic root of 25861231 is about 295.7216117359.

The spelling of 25861231 in words is "twenty-five million, eight hundred sixty-one thousand, two hundred thirty-one".