13520137 has 4 divisors (see below), whose sum is σ = 13547520. Its totient is φ = 13492756.

The previous prime is 13520099. The next prime is 13520147. The reversal of 13520137 is 73102531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13520137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13520147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12937 + ... + 13942.

It is an arithmetic number, because the mean of its divisors is an integer number (3386880).

Almost surely, 2^13520137 is an apocalyptic number.

It is an amenable number.

13520137 is a deficient number, since it is larger than the sum of its proper divisors (27383).

13520137 is an equidigital number, since it uses as much as digits as its factorization.

13520137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27382.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 13520137 is about 3676.9738916669. The cubic root of 13520137 is about 238.2284897011.

Adding to 13520137 its reverse (73102531), we get a palindrome (86622668).

The spelling of 13520137 in words is "thirteen million, five hundred twenty thousand, one hundred thirty-seven".