13128415 has 8 divisors (see below), whose sum is σ = 15812640. Its totient is φ = 10463712.

The previous prime is 13128413. The next prime is 13128419. The reversal of 13128415 is 51482131.

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

It is a cyclic number.

It is not a de Polignac number, because 13128415 - 2¹ = 13128413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13128415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13128413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3355 + ... + 6124.

It is an arithmetic number, because the mean of its divisors is an integer number (1976580).

Almost surely, 2^13128415 is an apocalyptic number.

13128415 is a deficient number, since it is larger than the sum of its proper divisors (2684225).

13128415 is an equidigital number, since it uses as much as digits as its factorization.

13128415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9761.

The product of its digits is 960, while the sum is 25.

The square root of 13128415 is about 3623.3154706705. The cubic root of 13128415 is about 235.9051555591.

The spelling of 13128415 in words is "thirteen million, one hundred twenty-eight thousand, four hundred fifteen".