25251565 has 8 divisors (see below), whose sum is σ = 30336768. Its totient is φ = 20178000.

The previous prime is 25251559. The next prime is 25251571. The reversal of 25251565 is 56515252.

It is an interprime number because it is at equal distance from previous prime (25251559) and next prime (25251571).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25251565 - 2⁹ = 25251053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2940 + ... + 7690.

It is an arithmetic number, because the mean of its divisors is an integer number (3792096).

Almost surely, 2^25251565 is an apocalyptic number.

It is an amenable number.

25251565 is a deficient number, since it is larger than the sum of its proper divisors (5085203).

25251565 is a wasteful number, since it uses less digits than its factorization.

25251565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5819.

The product of its digits is 15000, while the sum is 31.

The square root of 25251565 is about 5025.0935314678. The cubic root of 25251565 is about 293.3792764069.

The spelling of 25251565 in words is "twenty-five million, two hundred fifty-one thousand, five hundred sixty-five".