25266389 has 4 divisors (see below), whose sum is σ = 25300524. Its totient is φ = 25232256.

The previous prime is 25266361. The next prime is 25266427. The reversal of 25266389 is 98366252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17098225 + 8168164 = 4135^2 + 2858^2 .

It is a cyclic number.

It is not a de Polignac number, because 25266389 - 2¹⁶ = 25200853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25266349) 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, 15932 + ... + 17445.

It is an arithmetic number, because the mean of its divisors is an integer number (6325131).

Almost surely, 2^25266389 is an apocalyptic number.

It is an amenable number.

25266389 is a deficient number, since it is larger than the sum of its proper divisors (34135).

25266389 is an equidigital number, since it uses as much as digits as its factorization.

25266389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34134.

The product of its digits is 155520, while the sum is 41.

The square root of 25266389 is about 5026.5683124772. The cubic root of 25266389 is about 293.4366748775.

The spelling of 25266389 in words is "twenty-five million, two hundred sixty-six thousand, three hundred eighty-nine".