25740565 has 8 divisors (see below), whose sum is σ = 32231808. Its totient is φ = 19697040.

The previous prime is 25740521. The next prime is 25740569. The reversal of 25740565 is 56504752.

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

It is not a de Polignac number, because 25740565 - 2¹⁵ = 25707797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25740565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25740569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111801 + ... + 112030.

It is an arithmetic number, because the mean of its divisors is an integer number (4028976).

Almost surely, 2^25740565 is an apocalyptic number.

It is an amenable number.

25740565 is a deficient number, since it is larger than the sum of its proper divisors (6491243).

25740565 is a wasteful number, since it uses less digits than its factorization.

25740565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223859.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 25740565 is about 5073.5160391981. The cubic root of 25740565 is about 295.2609584003.

The spelling of 25740565 in words is "twenty-five million, seven hundred forty thousand, five hundred sixty-five".