13572945 has 24 divisors (see below), whose sum is σ = 23797800. Its totient is φ = 7155456.

The previous prime is 13572931. The next prime is 13572971. The reversal of 13572945 is 54927531.

It can be written as a sum of positive squares in 4 ways, for example, as 2702736 + 10870209 = 1644^2 + 3297^2 .

It is not a de Polignac number, because 13572945 - 2⁵ = 13572913 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2311 + ... + 5699.

It is an arithmetic number, because the mean of its divisors is an integer number (991575).

Almost surely, 2^13572945 is an apocalyptic number.

13572945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13572945 is a deficient number, since it is larger than the sum of its proper divisors (10224855).

13572945 is a wasteful number, since it uses less digits than its factorization.

13572945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489 (or 3486 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 13572945 is about 3684.1477983382. The cubic root of 13572945 is about 238.5382505269.

The spelling of 13572945 in words is "thirteen million, five hundred seventy-two thousand, nine hundred forty-five".