25172489 has 4 divisors (see below), whose sum is σ = 25475856. Its totient is φ = 24869124.

The previous prime is 25172471. The next prime is 25172491. The reversal of 25172489 is 98427152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25172489 - 2²⁴ = 8395273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25172429) 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 in 3 ways as a sum of consecutive naturals, for example, 151559 + ... + 151724.

It is an arithmetic number, because the mean of its divisors is an integer number (6368964).

Almost surely, 2^25172489 is an apocalyptic number.

It is an amenable number.

25172489 is a deficient number, since it is larger than the sum of its proper divisors (303367).

25172489 is an equidigital number, since it uses as much as digits as its factorization.

25172489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303366.

The product of its digits is 40320, while the sum is 38.

The square root of 25172489 is about 5017.2192497438. The cubic root of 25172489 is about 293.0727143085.

The spelling of 25172489 in words is "twenty-five million, one hundred seventy-two thousand, four hundred eighty-nine".