13172645 has 8 divisors (see below), whose sum is σ = 16066680. Its totient is φ = 10365120.

The previous prime is 13172639. The next prime is 13172651. The reversal of 13172645 is 54627131.

It is an interprime number because it is at equal distance from previous prime (13172639) and next prime (13172651).

It can be written as a sum of positive squares in 4 ways, for example, as 1110916 + 12061729 = 1054^2 + 3473^2 .

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

It is not a de Polignac number, because 13172645 - 2⁶ = 13172581 is a prime.

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, 21290 + ... + 21899.

It is an arithmetic number, because the mean of its divisors is an integer number (2008335).

Almost surely, 2^13172645 is an apocalyptic number.

It is an amenable number.

13172645 is a deficient number, since it is larger than the sum of its proper divisors (2894035).

13172645 is an equidigital number, since it uses as much as digits as its factorization.

13172645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43255.

The product of its digits is 5040, while the sum is 29.

The square root of 13172645 is about 3629.4138645241. The cubic root of 13172645 is about 236.1697823080.

Adding to 13172645 its reverse (54627131), we get a palindrome (67799776).

The spelling of 13172645 in words is "thirteen million, one hundred seventy-two thousand, six hundred forty-five".