13129145 has 4 divisors (see below), whose sum is σ = 15754980. Its totient is φ = 10503312.

The previous prime is 13129111. The next prime is 13129201. The reversal of 13129145 is 54192131.

13129145 is digitally balanced in base 2, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 2972176 + 10156969 = 1724^2 + 3187^2 .

It is a cyclic number.

It is not a de Polignac number, because 13129145 - 2¹⁴ = 13112761 is a prime.

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, 1312910 + ... + 1312919.

It is an arithmetic number, because the mean of its divisors is an integer number (3938745).

Almost surely, 2^13129145 is an apocalyptic number.

It is an amenable number.

13129145 is a deficient number, since it is larger than the sum of its proper divisors (2625835).

13129145 is an equidigital number, since it uses as much as digits as its factorization.

13129145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625834.

The product of its digits is 1080, while the sum is 26.

The square root of 13129145 is about 3623.4162057373. The cubic root of 13129145 is about 235.9095279471.

It can be divided in two parts, 131291 and 45, that multiplied together give a palindrome (5908095).

The spelling of 13129145 in words is "thirteen million, one hundred twenty-nine thousand, one hundred forty-five".