13172565 has 16 divisors (see below), whose sum is σ = 24087168. Its totient is φ = 6021696.

The previous prime is 13172563. The next prime is 13172573. The reversal of 13172565 is 56527131.

It is not a de Polignac number, because 13172565 - 2¹ = 13172563 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13172563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62622 + ... + 62831.

It is an arithmetic number, because the mean of its divisors is an integer number (1505448).

Almost surely, 2^13172565 is an apocalyptic number.

13172565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13172565 is a deficient number, since it is larger than the sum of its proper divisors (10914603).

13172565 is a wasteful number, since it uses less digits than its factorization.

13172565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125468.

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

The square root of 13172565 is about 3629.4028434441. The cubic root of 13172565 is about 236.1693042055.

Adding to 13172565 its reverse (56527131), we get a palindrome (69699696).

It can be divided in two parts, 13 and 172565, that added together give a triangular number (172578 = T₅₈₇).

The spelling of 13172565 in words is "thirteen million, one hundred seventy-two thousand, five hundred sixty-five".