25667642 has 32 divisors (see below), whose sum is σ = 51698304. Its totient is φ = 9230400.

The previous prime is 25667627. The next prime is 25667683. The reversal of 25667642 is 24676652.

It is a junction number, because it is equal to n+sod(n) for n = 25667596 and 25667605.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4409 + ... + 8412.

It is an arithmetic number, because the mean of its divisors is an integer number (1615572).

Almost surely, 2^25667642 is an apocalyptic number.

25667642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25667642 is an abundant number, since it is smaller than the sum of its proper divisors (26030662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25667642 is a wasteful number, since it uses less digits than its factorization.

25667642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12854.

The product of its digits is 120960, while the sum is 38.

The square root of 25667642 is about 5066.3243086088. The cubic root of 25667642 is about 294.9818699956.

The spelling of 25667642 in words is "twenty-five million, six hundred sixty-seven thousand, six hundred forty-two".