12561199 has 12 divisors (see below), whose sum is σ = 14671800. Its totient is φ = 10722768.

The previous prime is 12561187. The next prime is 12561217. The reversal of 12561199 is 99116521.

It is a happy number.

It is not a de Polignac number, because 12561199 - 2¹⁵ = 12528431 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 (12561139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18732 + ... + 19390.

It is an arithmetic number, because the mean of its divisors is an integer number (1222650).

Almost surely, 2^12561199 is an apocalyptic number.

12561199 is a deficient number, since it is larger than the sum of its proper divisors (2110601).

12561199 is an equidigital number, since it uses as much as digits as its factorization.

With its successor (12561200) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (1062).

12561199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062 (or 1055 counting only the distinct ones).

The product of its digits is 4860, while the sum is 34.

The square root of 12561199 is about 3544.1781840082. The cubic root of 12561199 is about 232.4575727107.

The spelling of 12561199 in words is "twelve million, five hundred sixty-one thousand, one hundred ninety-nine".