25251289 has 4 divisors (see below), whose sum is σ = 28858624. Its totient is φ = 21643956.

The previous prime is 25251287. The next prime is 25251301. The reversal of 25251289 is 98215252.

It is a happy number.

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 25251289 - 2¹ = 25251287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25251287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1803657 + ... + 1803670.

It is an arithmetic number, because the mean of its divisors is an integer number (7214656).

Almost surely, 2^25251289 is an apocalyptic number.

It is an amenable number.

25251289 is a deficient number, since it is larger than the sum of its proper divisors (3607335).

25251289 is an equidigital number, since it uses as much as digits as its factorization.

25251289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607334.

The product of its digits is 14400, while the sum is 34.

The square root of 25251289 is about 5025.0660692174. The cubic root of 25251289 is about 293.3782075230.

The spelling of 25251289 in words is "twenty-five million, two hundred fifty-one thousand, two hundred eighty-nine".