12507479 has 4 divisors (see below), whose sum is σ = 12584376. Its totient is φ = 12430584.

The previous prime is 12507457. The next prime is 12507503. The reversal of 12507479 is 97470521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97470521 = 1259 ⋅77419.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12507479 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 (12507409) 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, 38204 + ... + 38529.

It is an arithmetic number, because the mean of its divisors is an integer number (3146094).

Almost surely, 2^12507479 is an apocalyptic number.

12507479 is a deficient number, since it is larger than the sum of its proper divisors (76897).

12507479 is an equidigital number, since it uses as much as digits as its factorization.

12507479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76896.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 12507479 is about 3536.5914380940. The cubic root of 12507479 is about 232.1257183763.

The spelling of 12507479 in words is "twelve million, five hundred seven thousand, four hundred seventy-nine".