13557129 has 12 divisors (see below), whose sum is σ = 18298128. Its totient is φ = 8928400.

The previous prime is 13557119. The next prime is 13557149. The reversal of 13557129 is 92175531.

It is not a de Polignac number, because 13557129 - 2⁹ = 13556617 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13557129.

It is not an unprimeable number, because it can be changed into a prime (13557119) 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, 30382 + ... + 30824.

It is an arithmetic number, because the mean of its divisors is an integer number (1524844).

Almost surely, 2^13557129 is an apocalyptic number.

It is an amenable number.

13557129 is a deficient number, since it is larger than the sum of its proper divisors (4740999).

13557129 is an equidigital number, since it uses as much as digits as its factorization.

13557129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 547 counting only the distinct ones).

The product of its digits is 9450, while the sum is 33.

The square root of 13557129 is about 3682.0006789788. Note that the first 3 decimals coincide. The cubic root of 13557129 is about 238.4455615460.

The spelling of 13557129 in words is "thirteen million, five hundred fifty-seven thousand, one hundred twenty-nine".