13145680 has 20 divisors (see below), whose sum is σ = 30563892. Its totient is φ = 5258240.

The previous prime is 13145651. The next prime is 13145681. The reversal of 13145680 is 8654131.

It can be written as a sum of positive squares in 2 ways, for example, as 2096704 + 11048976 = 1448^2 + 3324^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13145681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82081 + ... + 82240.

Almost surely, 2^13145680 is an apocalyptic number.

13145680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13145680 is an abundant number, since it is smaller than the sum of its proper divisors (17418212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13145680 is a wasteful number, since it uses less digits than its factorization.

13145680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164334 (or 164328 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 13145680 is about 3625.6971743376. The cubic root of 13145680 is about 236.0085221475.

The spelling of 13145680 in words is "thirteen million, one hundred forty-five thousand, six hundred eighty".