25172998 has 4 divisors (see below), whose sum is σ = 37759500. Its totient is φ = 12586498.

The previous prime is 25172993. The next prime is 25173007. The reversal of 25172998 is 89927152.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25172993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6293248 + ... + 6293251.

It is an arithmetic number, because the mean of its divisors is an integer number (9439875).

Almost surely, 2^25172998 is an apocalyptic number.

25172998 is a deficient number, since it is larger than the sum of its proper divisors (12586502).

25172998 is a wasteful number, since it uses less digits than its factorization.

25172998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12586501.

The product of its digits is 90720, while the sum is 43.

The square root of 25172998 is about 5017.2699747971. The cubic root of 25172998 is about 293.0746896529.

The spelling of 25172998 in words is "twenty-five million, one hundred seventy-two thousand, nine hundred ninety-eight".