13165725 has 12 divisors (see below), whose sum is σ = 21767456. Its totient is φ = 7021680.

The previous prime is 13165721. The next prime is 13165751. The reversal of 13165725 is 52756131.

13165725 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13165725 - 2² = 13165721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13165692 and 13165701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13165721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87697 + ... + 87846.

Almost surely, 2^13165725 is an apocalyptic number.

13165725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13165725 is a deficient number, since it is larger than the sum of its proper divisors (8601731).

13165725 is a wasteful number, since it uses less digits than its factorization.

13165725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175556 (or 175551 counting only the distinct ones).

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

The square root of 13165725 is about 3628.4604173120. The cubic root of 13165725 is about 236.1284192874.

It can be divided in two parts, 131 and 65725, that added together give a palindrome (65856).

The spelling of 13165725 in words is "thirteen million, one hundred sixty-five thousand, seven hundred twenty-five".