25426681 has 4 divisors (see below), whose sum is σ = 29059072. Its totient is φ = 21794292.

The previous prime is 25426657. The next prime is 25426721. The reversal of 25426681 is 18662452.

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 25426681 - 2⁷ = 25426553 is a prime.

It is a super-2 number, since 2×25426681² = 1293032213351522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25426651) 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, 1816185 + ... + 1816198.

It is an arithmetic number, because the mean of its divisors is an integer number (7264768).

Almost surely, 2^25426681 is an apocalyptic number.

It is an amenable number.

25426681 is a deficient number, since it is larger than the sum of its proper divisors (3632391).

25426681 is an equidigital number, since it uses as much as digits as its factorization.

25426681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632390.

The product of its digits is 23040, while the sum is 34.

The square root of 25426681 is about 5042.4875805499. The cubic root of 25426681 is about 294.0558958619.

The spelling of 25426681 in words is "twenty-five million, four hundred twenty-six thousand, six hundred eighty-one".