25805165 has 8 divisors (see below), whose sum is σ = 31008768. Its totient is φ = 20615760.

The previous prime is 25805147. The next prime is 25805179. The reversal of 25805165 is 56150852.

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

It is not a de Polignac number, because 25805165 - 2¹⁴ = 25788781 is a prime.

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, 980 + ... + 7250.

It is an arithmetic number, because the mean of its divisors is an integer number (3876096).

Almost surely, 2^25805165 is an apocalyptic number.

It is an amenable number.

25805165 is a deficient number, since it is larger than the sum of its proper divisors (5203603).

25805165 is an equidigital number, since it uses as much as digits as its factorization.

25805165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7099.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 25805165 is about 5079.8784434276. The cubic root of 25805165 is about 295.5077533436.

The spelling of 25805165 in words is "twenty-five million, eight hundred five thousand, one hundred sixty-five".