25315761 has 4 divisors (see below), whose sum is σ = 33754352. Its totient is φ = 16877172.

The previous prime is 25315757. The next prime is 25315769. The reversal of 25315761 is 16751352.

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 not a de Polignac number, because 25315761 - 2² = 25315757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25315769) 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, 4219291 + ... + 4219296.

It is an arithmetic number, because the mean of its divisors is an integer number (8438588).

Almost surely, 2^25315761 is an apocalyptic number.

It is an amenable number.

25315761 is a deficient number, since it is larger than the sum of its proper divisors (8438591).

25315761 is an equidigital number, since it uses as much as digits as its factorization.

25315761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8438590.

The product of its digits is 6300, while the sum is 30.

The square root of 25315761 is about 5031.4770197229. The cubic root of 25315761 is about 293.6276813199.

The spelling of 25315761 in words is "twenty-five million, three hundred fifteen thousand, seven hundred sixty-one".