12579491 has 4 divisors (see below), whose sum is σ = 12599184. Its totient is φ = 12559800.

The previous prime is 12579467. The next prime is 12579509. The reversal of 12579491 is 19497521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12579491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12579431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8855 + ... + 10176.

It is an arithmetic number, because the mean of its divisors is an integer number (3149796).

Almost surely, 2^12579491 is an apocalyptic number.

12579491 is a deficient number, since it is larger than the sum of its proper divisors (19693).

12579491 is an equidigital number, since it uses as much as digits as its factorization.

12579491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19692.

The product of its digits is 22680, while the sum is 38.

The square root of 12579491 is about 3546.7578152448. The cubic root of 12579491 is about 232.5703552449.

The spelling of 12579491 in words is "twelve million, five hundred seventy-nine thousand, four hundred ninety-one".