25198065 has 24 divisors (see below), whose sum is σ = 43840680. Its totient is φ = 13388544.

The previous prime is 25198049. The next prime is 25198091. The reversal of 25198065 is 56089152.

It is a happy number.

25198065 is a `hidden beast` number, since 2 + 519 + 80 + 65 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1461681 + 23736384 = 1209^2 + 4872^2 .

It is not a de Polignac number, because 25198065 - 2⁴ = 25198049 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13191 + ... + 14979.

It is an arithmetic number, because the mean of its divisors is an integer number (1826695).

Almost surely, 2^25198065 is an apocalyptic number.

It is an amenable number.

25198065 is a deficient number, since it is larger than the sum of its proper divisors (18642615).

25198065 is a wasteful number, since it uses less digits than its factorization.

25198065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113 (or 2110 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 25198065 is about 5019.7674248913. The cubic root of 25198065 is about 293.1719375860.

The spelling of 25198065 in words is "twenty-five million, one hundred ninety-eight thousand, sixty-five".