13157545 has 4 divisors (see below), whose sum is σ = 15789060. Its totient is φ = 10526032.

The previous prime is 13157539. The next prime is 13157563. The reversal of 13157545 is 54575131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10361961 + 2795584 = 3219^2 + 1672^2 .

It is a cyclic number.

It is not a de Polignac number, because 13157545 - 2³ = 13157537 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315750 + ... + 1315759.

It is an arithmetic number, because the mean of its divisors is an integer number (3947265).

Almost surely, 2^13157545 is an apocalyptic number.

It is an amenable number.

13157545 is a deficient number, since it is larger than the sum of its proper divisors (2631515).

13157545 is an equidigital number, since it uses as much as digits as its factorization.

13157545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631514.

The product of its digits is 10500, while the sum is 31.

The square root of 13157545 is about 3627.3330423329. Note that the first 3 decimals coincide. The cubic root of 13157545 is about 236.0795061529.

The spelling of 13157545 in words is "thirteen million, one hundred fifty-seven thousand, five hundred forty-five".