12479569 has 4 divisors (see below), whose sum is σ = 12650596. Its totient is φ = 12308544.

The previous prime is 12479567. The next prime is 12479587. The reversal of 12479569 is 96597421.

It is a happy number.

12479569 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 can be written as a sum of positive squares in 2 ways, for example, as 9381969 + 3097600 = 3063^2 + 1760^2 .

It is a cyclic number.

It is not a de Polignac number, because 12479569 - 2¹ = 12479567 is a prime.

It is a super-2 number, since 2×12479569² = 311479284851522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12479567) 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 3 ways as a sum of consecutive naturals, for example, 85404 + ... + 85549.

It is an arithmetic number, because the mean of its divisors is an integer number (3162649).

Almost surely, 2^12479569 is an apocalyptic number.

It is an amenable number.

12479569 is a deficient number, since it is larger than the sum of its proper divisors (171027).

12479569 is an equidigital number, since it uses as much as digits as its factorization.

12479569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171026.

The product of its digits is 136080, while the sum is 43.

The square root of 12479569 is about 3532.6433445792. The cubic root of 12479569 is about 231.9529296598.

It can be divided in two parts, 1247 and 9569, that added together give a square (10816 = 104²).

The spelling of 12479569 in words is "twelve million, four hundred seventy-nine thousand, five hundred sixty-nine".