13128371 has 8 divisors (see below), whose sum is σ = 13332480. Its totient is φ = 12926088.

The previous prime is 13128347. The next prime is 13128413. The reversal of 13128371 is 17382131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13128371 is a prime.

It is a super-2 number, since 2×13128371² = 344708250227282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13128371.

It is not an unprimeable number, because it can be changed into a prime (13128571) 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 7 ways as a sum of consecutive naturals, for example, 20900 + ... + 21518.

It is an arithmetic number, because the mean of its divisors is an integer number (1666560).

Almost surely, 2^13128371 is an apocalyptic number.

13128371 is a deficient number, since it is larger than the sum of its proper divisors (204109).

13128371 is a wasteful number, since it uses less digits than its factorization.

13128371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913.

The product of its digits is 1008, while the sum is 26.

The square root of 13128371 is about 3623.3093988783. The cubic root of 13128371 is about 235.9048920127.

The spelling of 13128371 in words is "thirteen million, one hundred twenty-eight thousand, three hundred seventy-one".