12157579 has 4 divisors (see below), whose sum is σ = 13894384. Its totient is φ = 10420776.

The previous prime is 12157577. The next prime is 12157597. The reversal of 12157579 is 97575121.

12157579 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12157579 - 2¹ = 12157577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12157577) 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 3 ways as a sum of consecutive naturals, for example, 868392 + ... + 868405.

It is an arithmetic number, because the mean of its divisors is an integer number (3473596).

Almost surely, 2^12157579 is an apocalyptic number.

12157579 is a deficient number, since it is larger than the sum of its proper divisors (1736805).

12157579 is an equidigital number, since it uses as much as digits as its factorization.

12157579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736804.

The product of its digits is 22050, while the sum is 37.

The square root of 12157579 is about 3486.7720028703. The cubic root of 12157579 is about 229.9406210924.

The spelling of 12157579 in words is "twelve million, one hundred fifty-seven thousand, five hundred seventy-nine".