13134721 has 4 divisors (see below), whose sum is σ = 13238272. Its totient is φ = 13031172.

The previous prime is 13134701. The next prime is 13134739. The reversal of 13134721 is 12743131.

13134721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 13134721 - 2⁵ = 13134689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13134692 and 13134701.

It is not an unprimeable number, because it can be changed into a prime (13134701) 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, 51585 + ... + 51838.

It is an arithmetic number, because the mean of its divisors is an integer number (3309568).

Almost surely, 2^13134721 is an apocalyptic number.

It is an amenable number.

13134721 is a deficient number, since it is larger than the sum of its proper divisors (103551).

13134721 is a wasteful number, since it uses less digits than its factorization.

13134721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103550.

The product of its digits is 504, while the sum is 22.

The square root of 13134721 is about 3624.1855636819. The cubic root of 13134721 is about 235.9429204579.

Adding to 13134721 its reverse (12743131), we get a palindrome (25877852).

The spelling of 13134721 in words is "thirteen million, one hundred thirty-four thousand, seven hundred twenty-one".