13128397 has 8 divisors (see below), whose sum is σ = 13400640. Its totient is φ = 12858720.

The previous prime is 13128347. The next prime is 13128413. The reversal of 13128397 is 79382131.

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-13128397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13128337) 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, 12193 + ... + 13225.

It is an arithmetic number, because the mean of its divisors is an integer number (1675080).

Almost surely, 2^13128397 is an apocalyptic number.

It is an amenable number.

13128397 is a deficient number, since it is larger than the sum of its proper divisors (272243).

13128397 is a wasteful number, since it uses less digits than its factorization.

13128397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283.

The product of its digits is 9072, while the sum is 34.

The square root of 13128397 is about 3623.3129867567. The cubic root of 13128397 is about 235.9050477448.

The spelling of 13128397 in words is "thirteen million, one hundred twenty-eight thousand, three hundred ninety-seven".