25712765 has 8 divisors (see below), whose sum is σ = 33228888. Its totient is φ = 18987840.

The previous prime is 25712759. The next prime is 25712777. The reversal of 25712765 is 56721752.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1378276 + 24334489 = 1174^2 + 4933^2 .

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

It is not a de Polignac number, because 25712765 - 2⁴ = 25712749 is a prime.

It is a super-2 number, since 2×25712765² = 1322292567890450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197726 + ... + 197855.

It is an arithmetic number, because the mean of its divisors is an integer number (4153611).

Almost surely, 2^25712765 is an apocalyptic number.

It is an amenable number.

25712765 is a deficient number, since it is larger than the sum of its proper divisors (7516123).

25712765 is a wasteful number, since it uses less digits than its factorization.

25712765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395599.

The product of its digits is 29400, while the sum is 35.

The square root of 25712765 is about 5070.7755817035. The cubic root of 25712765 is about 295.1546254403.

The spelling of 25712765 in words is "twenty-five million, seven hundred twelve thousand, seven hundred sixty-five".