25561065 has 16 divisors (see below), whose sum is σ = 41475456. Its totient is φ = 13440000.

The previous prime is 25561057. The next prime is 25561079. The reversal of 25561065 is 56016552.

It is not a de Polignac number, because 25561065 - 2³ = 25561057 is a prime.

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, 10936 + ... + 13065.

It is an arithmetic number, because the mean of its divisors is an integer number (2592216).

Almost surely, 2^25561065 is an apocalyptic number.

It is an amenable number.

25561065 is a deficient number, since it is larger than the sum of its proper divisors (15914391).

25561065 is a wasteful number, since it uses less digits than its factorization.

25561065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24080.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 25561065 is about 5055.7951896808. The cubic root of 25561065 is about 294.5730297392.

The spelling of 25561065 in words is "twenty-five million, five hundred sixty-one thousand, sixty-five".