25705605 has 16 divisors (see below), whose sum is σ = 42917760. Its totient is φ = 13113408.

The previous prime is 25705601. The next prime is 25705609. The reversal of 25705605 is 50650752.

It is an interprime number because it is at equal distance from previous prime (25705601) and next prime (25705609).

It is not a de Polignac number, because 25705605 - 2² = 25705601 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25705601) 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, 36910 + ... + 37599.

It is an arithmetic number, because the mean of its divisors is an integer number (2682360).

Almost surely, 2^25705605 is an apocalyptic number.

It is an amenable number.

25705605 is a deficient number, since it is larger than the sum of its proper divisors (17212155).

25705605 is a wasteful number, since it uses less digits than its factorization.

25705605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74540.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 25705605 is about 5070.0695261505. The cubic root of 25705605 is about 295.1272265548.

The spelling of 25705605 in words is "twenty-five million, seven hundred five thousand, six hundred five".