25485665 has 8 divisors (see below), whose sum is σ = 30632040. Its totient is φ = 20355712.

The previous prime is 25485623. The next prime is 25485667. The reversal of 25485665 is 56658452.

It can be written as a sum of positive squares in 4 ways, for example, as 7879249 + 17606416 = 2807^2 + 4196^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25485665 - 2⁸ = 25485409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25485667) 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, 380 + ... + 7149.

It is an arithmetic number, because the mean of its divisors is an integer number (3829005).

Almost surely, 2^25485665 is an apocalyptic number.

It is an amenable number.

25485665 is a deficient number, since it is larger than the sum of its proper divisors (5146375).

25485665 is an equidigital number, since it uses as much as digits as its factorization.

25485665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8211.

The product of its digits is 288000, while the sum is 41.

The square root of 25485665 is about 5048.3328931440. The cubic root of 25485665 is about 294.2831007470.

The spelling of 25485665 in words is "twenty-five million, four hundred eighty-five thousand, six hundred sixty-five".