13128585 has 8 divisors (see below), whose sum is σ = 21005760. Its totient is φ = 7001904.

The previous prime is 13128581. The next prime is 13128587. The reversal of 13128585 is 58582131.

It is a happy number.

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

It is not a de Polignac number, because 13128585 - 2² = 13128581 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13128581) 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, 437605 + ... + 437634.

It is an arithmetic number, because the mean of its divisors is an integer number (2625720).

Almost surely, 2^13128585 is an apocalyptic number.

13128585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13128585 is a deficient number, since it is larger than the sum of its proper divisors (7877175).

13128585 is an equidigital number, since it uses as much as digits as its factorization.

13128585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875247.

The product of its digits is 9600, while the sum is 33.

The square root of 13128585 is about 3623.3389297718. The cubic root of 13128585 is about 235.9061738009.

The spelling of 13128585 in words is "thirteen million, one hundred twenty-eight thousand, five hundred eighty-five".