12561959 has 8 divisors (see below), whose sum is σ = 13180320. Its totient is φ = 11956000.

The previous prime is 12561947. The next prime is 12561961. The reversal of 12561959 is 95916521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12561959 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 (12561359) 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, 992 + ... + 5109.

It is an arithmetic number, because the mean of its divisors is an integer number (1647540).

Almost surely, 2^12561959 is an apocalyptic number.

12561959 is a deficient number, since it is larger than the sum of its proper divisors (618361).

12561959 is an equidigital number, since it uses as much as digits as its factorization.

12561959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6201.

The product of its digits is 24300, while the sum is 38.

The square root of 12561959 is about 3544.2854004721. The cubic root of 12561959 is about 232.4622608033.

The spelling of 12561959 in words is "twelve million, five hundred sixty-one thousand, nine hundred fifty-nine".