25515498 has 8 divisors (see below), whose sum is σ = 51031008. Its totient is φ = 8505164.

The previous prime is 25515493. The next prime is 25515509. The reversal of 25515498 is 89451552.

It is a sphenic number, since it is the product of 3 distinct primes.

25515498 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (25515491) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2126286 + ... + 2126297.

It is an arithmetic number, because the mean of its divisors is an integer number (6378876).

Almost surely, 2^25515498 is an apocalyptic number.

25515498 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25515498 is a wasteful number, since it uses less digits than its factorization.

25515498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252588.

The product of its digits is 72000, while the sum is 39.

The square root of 25515498 is about 5051.2867667556. The cubic root of 25515498 is about 294.3978832379.

It can be divided in two parts, 255 and 15498, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 25515498 in words is "twenty-five million, five hundred fifteen thousand, four hundred ninety-eight".