13128734 has 16 divisors (see below), whose sum is σ = 20803200. Its totient is φ = 6196824.

The previous prime is 13128727. The next prime is 13128737. The reversal of 13128734 is 43782131.

It is a junction number, because it is equal to n+sod(n) for n = 13128697 and 13128706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13128737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16289 + ... + 17075.

It is an arithmetic number, because the mean of its divisors is an integer number (1300200).

Almost surely, 2^13128734 is an apocalyptic number.

13128734 is a deficient number, since it is larger than the sum of its proper divisors (7674466).

13128734 is a wasteful number, since it uses less digits than its factorization.

13128734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247.

The product of its digits is 4032, while the sum is 29.

The square root of 13128734 is about 3623.3594908593. The cubic root of 13128734 is about 235.9070662527.

The spelling of 13128734 in words is "thirteen million, one hundred twenty-eight thousand, seven hundred thirty-four".