25481589 has 32 divisors (see below), whose sum is σ = 41492736. Its totient is φ = 13578240.

The previous prime is 25481587. The next prime is 25481611. The reversal of 25481589 is 98518452.

It is a happy number.

It is not a de Polignac number, because 25481589 - 2¹ = 25481587 is a prime.

It is a super-2 number, since 2×25481589² = 1298622755929842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25481589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25481587) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48649 + ... + 49169.

It is an arithmetic number, because the mean of its divisors is an integer number (1296648).

Almost surely, 2^25481589 is an apocalyptic number.

It is an amenable number.

25481589 is a deficient number, since it is larger than the sum of its proper divisors (16011147).

25481589 is a wasteful number, since it uses less digits than its factorization.

25481589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685.

The product of its digits is 115200, while the sum is 42.

The square root of 25481589 is about 5047.9291793764. The cubic root of 25481589 is about 294.2674113798.

The spelling of 25481589 in words is "twenty-five million, four hundred eighty-one thousand, five hundred eighty-nine".