25655961 has 16 divisors (see below), whose sum is σ = 35010560. Its totient is φ = 16707600.

The previous prime is 25655953. The next prime is 25655963. The reversal of 25655961 is 16955652.

It is not a de Polignac number, because 25655961 - 2³ = 25655953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25655963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23886 + ... + 24936.

It is an arithmetic number, because the mean of its divisors is an integer number (2188160).

Almost surely, 2^25655961 is an apocalyptic number.

It is an amenable number.

25655961 is a deficient number, since it is larger than the sum of its proper divisors (9354599).

25655961 is a wasteful number, since it uses less digits than its factorization.

25655961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its digits is 81000, while the sum is 39.

The square root of 25655961 is about 5065.1713692628. The cubic root of 25655961 is about 294.9371157736.

The spelling of 25655961 in words is "twenty-five million, six hundred fifty-five thousand, nine hundred sixty-one".