25508965 has 8 divisors (see below), whose sum is σ = 30651768. Its totient is φ = 20379840.

The previous prime is 25508957. The next prime is 25508969. The reversal of 25508965 is 56980552.

It can be written as a sum of positive squares in 4 ways, for example, as 1684804 + 23824161 = 1298^2 + 4881^2 .

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

It is not a de Polignac number, because 25508965 - 2³ = 25508957 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 (25508969) 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, 1275 + ... + 7255.

It is an arithmetic number, because the mean of its divisors is an integer number (3831471).

Almost surely, 2^25508965 is an apocalyptic number.

It is an amenable number.

25508965 is a deficient number, since it is larger than the sum of its proper divisors (5142803).

25508965 is an equidigital number, since it uses as much as digits as its factorization.

25508965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6839.

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 25508965 is about 5050.6400584480. The cubic root of 25508965 is about 294.3727551694.

The spelling of 25508965 in words is "twenty-five million, five hundred eight thousand, nine hundred sixty-five".