25651489 has 6 divisors (see below), whose sum is σ = 26097170. Its totient is φ = 25213296.

The previous prime is 25651459. The next prime is 25651513. The reversal of 25651489 is 98415652.

It can be written as a sum of positive squares in only one way, i.e., 25150225 + 501264 = 5015^2 + 708^2 .

It is not a de Polignac number, because 25651489 - 2¹¹ = 25649441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25651459) 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 5 ways as a sum of consecutive naturals, for example, 204 + ... + 7165.

Almost surely, 2^25651489 is an apocalyptic number.

It is an amenable number.

25651489 is a deficient number, since it is larger than the sum of its proper divisors (445681).

25651489 is an frugal number, since it uses more digits than its factorization.

25651489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7487 (or 7428 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 25651489 is about 5064.7299039534. The cubic root of 25651489 is about 294.9199782953.

The spelling of 25651489 in words is "twenty-five million, six hundred fifty-one thousand, four hundred eighty-nine".