25122865 has 16 divisors (see below), whose sum is σ = 31426560. Its totient is φ = 19258560.

The previous prime is 25122859. The next prime is 25122871. The reversal of 25122865 is 56822152.

It is an interprime number because it is at equal distance from previous prime (25122859) and next prime (25122871).

It is not a de Polignac number, because 25122865 - 2³ = 25122857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 16152 + ... + 17638.

It is an arithmetic number, because the mean of its divisors is an integer number (1964160).

Almost surely, 2^25122865 is an apocalyptic number.

It is an amenable number.

25122865 is a deficient number, since it is larger than the sum of its proper divisors (6303695).

25122865 is a wasteful number, since it uses less digits than its factorization.

25122865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632.

The product of its digits is 9600, while the sum is 31.

The square root of 25122865 is about 5012.2714411732. The cubic root of 25122865 is about 292.8800038243.

The spelling of 25122865 in words is "twenty-five million, one hundred twenty-two thousand, eight hundred sixty-five".