12531679 has 4 divisors (see below), whose sum is σ = 12553200. Its totient is φ = 12510160.

The previous prime is 12531671. The next prime is 12531689. The reversal of 12531679 is 97613521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97613521 = 7507 ⋅13003.

It is a cyclic number.

It is not a de Polignac number, because 12531679 - 2³ = 12531671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12531671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9862 + ... + 11059.

It is an arithmetic number, because the mean of its divisors is an integer number (3138300).

Almost surely, 2^12531679 is an apocalyptic number.

12531679 is a deficient number, since it is larger than the sum of its proper divisors (21521).

12531679 is an equidigital number, since it uses as much as digits as its factorization.

12531679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21520.

The product of its digits is 11340, while the sum is 34.

The square root of 12531679 is about 3540.0111581745. The cubic root of 12531679 is about 232.2753308153.

The spelling of 12531679 in words is "twelve million, five hundred thirty-one thousand, six hundred seventy-nine".