12513947 has 4 divisors (see below), whose sum is σ = 12527856. Its totient is φ = 12500040.

The previous prime is 12513931. The next prime is 12513953. The reversal of 12513947 is 74931521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74931521 = 7 ⋅10704503.

It is a cyclic number.

It is not a de Polignac number, because 12513947 - 2⁴ = 12513931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12513847) 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, 5504 + ... + 7437.

It is an arithmetic number, because the mean of its divisors is an integer number (3131964).

Almost surely, 2^12513947 is an apocalyptic number.

12513947 is a deficient number, since it is larger than the sum of its proper divisors (13909).

12513947 is an equidigital number, since it uses as much as digits as its factorization.

12513947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13908.

The product of its digits is 7560, while the sum is 32.

The square root of 12513947 is about 3537.5057597126. The cubic root of 12513947 is about 232.1657245842.

The spelling of 12513947 in words is "twelve million, five hundred thirteen thousand, nine hundred forty-seven".