25489617 has 4 divisors (see below), whose sum is σ = 33986160. Its totient is φ = 16993076.

The previous prime is 25489609. The next prime is 25489627. The reversal of 25489617 is 71698452.

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 a cyclic number.

It is not a de Polignac number, because 25489617 - 2³ = 25489609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25489627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4248267 + ... + 4248272.

It is an arithmetic number, because the mean of its divisors is an integer number (8496540).

Almost surely, 2^25489617 is an apocalyptic number.

It is an amenable number.

25489617 is a deficient number, since it is larger than the sum of its proper divisors (8496543).

25489617 is an equidigital number, since it uses as much as digits as its factorization.

25489617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8496542.

The product of its digits is 120960, while the sum is 42.

The square root of 25489617 is about 5048.7242943144. The cubic root of 25489617 is about 294.2983112154.

It can be divided in two parts, 25489 and 617, that added together give a triangular number (26106 = T₂₂₈).

The spelling of 25489617 in words is "twenty-five million, four hundred eighty-nine thousand, six hundred seventeen".