12517561 has 8 divisors (see below), whose sum is σ = 15058880. Its totient is φ = 10164528.

The previous prime is 12517541. The next prime is 12517579. The reversal of 12517561 is 16571521.

12517561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12517561 - 2¹¹ = 12515513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12517511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46926 + ... + 47191.

It is an arithmetic number, because the mean of its divisors is an integer number (1882360).

Almost surely, 2^12517561 is an apocalyptic number.

It is an amenable number.

12517561 is a deficient number, since it is larger than the sum of its proper divisors (2541319).

12517561 is an equidigital number, since it uses as much as digits as its factorization.

12517561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94143.

The product of its digits is 2100, while the sum is 28.

The square root of 12517561 is about 3538.0165347268. The cubic root of 12517561 is about 232.1880720810.

The spelling of 12517561 in words is "twelve million, five hundred seventeen thousand, five hundred sixty-one".