13512729 has 4 divisors (see below), whose sum is σ = 18016976. Its totient is φ = 9008484.

The previous prime is 13512703. The next prime is 13512731. The reversal of 13512729 is 92721531.

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 not a de Polignac number, because 13512729 - 2⁷ = 13512601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13512696 and 13512705.

It is not an unprimeable number, because it can be changed into a prime (13512769) 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, 2252119 + ... + 2252124.

It is an arithmetic number, because the mean of its divisors is an integer number (4504244).

Almost surely, 2^13512729 is an apocalyptic number.

It is an amenable number.

13512729 is a deficient number, since it is larger than the sum of its proper divisors (4504247).

13512729 is an equidigital number, since it uses as much as digits as its factorization.

13512729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504246.

The product of its digits is 3780, while the sum is 30.

The square root of 13512729 is about 3675.9664035461. The cubic root of 13512729 is about 238.1849714272.

It can be divided in two parts, 13512 and 729, that added together give a palindrome (14241).

The spelling of 13512729 in words is "thirteen million, five hundred twelve thousand, seven hundred twenty-nine".