25179489 has 12 divisors (see below), whose sum is σ = 36987600. Its totient is φ = 16501464.

The previous prime is 25179487. The next prime is 25179491. The reversal of 25179489 is 98497152.

Added to its reverse (98497152) it gives a square (123676641 = 11121²).

It is an interprime number because it is at equal distance from previous prime (25179487) and next prime (25179491).

It is not a de Polignac number, because 25179489 - 2¹ = 25179487 is a prime.

It is a super-2 number, since 2×25179489² = 1268013332602242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (25179487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23179 + ... + 24240.

It is an arithmetic number, because the mean of its divisors is an integer number (3082300).

Almost surely, 2^25179489 is an apocalyptic number.

It is an amenable number.

25179489 is a deficient number, since it is larger than the sum of its proper divisors (11808111).

25179489 is a wasteful number, since it uses less digits than its factorization.

25179489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47484 (or 47481 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 25179489 is about 5017.9167988320. The cubic root of 25179489 is about 293.0998778105.

Adding to 25179489 its reverse (98497152), we get a square (123676641 = 11121²).

The spelling of 25179489 in words is "twenty-five million, one hundred seventy-nine thousand, four hundred eighty-nine".