25198135 has 12 divisors (see below), whose sum is σ = 30576168. Its totient is φ = 19935008.

The previous prime is 25198111. The next prime is 25198163. The reversal of 25198135 is 53189152.

It is a de Polignac number, because none of the positive numbers 2^k-25198135 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25198135.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 110892 + ... + 111118.

It is an arithmetic number, because the mean of its divisors is an integer number (2548014).

Almost surely, 2^25198135 is an apocalyptic number.

25198135 is a deficient number, since it is larger than the sum of its proper divisors (5378033).

25198135 is an equidigital number, since it uses as much as digits as its factorization.

25198135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 381 counting only the distinct ones).

The product of its digits is 10800, while the sum is 34.

The square root of 25198135 is about 5019.7743973211. The cubic root of 25198135 is about 293.1722090620.

The spelling of 25198135 in words is "twenty-five million, one hundred ninety-eight thousand, one hundred thirty-five".