12520479 has 4 divisors (see below), whose sum is σ = 16693976. Its totient is φ = 8346984.

The previous prime is 12520477. The next prime is 12520481. The reversal of 12520479 is 97402521.

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

It is an interprime number because it is at equal distance from previous prime (12520477) and next prime (12520481).

It is not a de Polignac number, because 12520479 - 2¹ = 12520477 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 (12520477) 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, 2086744 + ... + 2086749.

It is an arithmetic number, because the mean of its divisors is an integer number (4173494).

Almost surely, 2^12520479 is an apocalyptic number.

12520479 is a deficient number, since it is larger than the sum of its proper divisors (4173497).

12520479 is an equidigital number, since it uses as much as digits as its factorization.

12520479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4173496.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 12520479 is about 3538.4288886454. The cubic root of 12520479 is about 232.2061126602.

The spelling of 12520479 in words is "twelve million, five hundred twenty thousand, four hundred seventy-nine".