12561146 has 16 divisors (see below), whose sum is σ = 20412000. Its totient is φ = 5762928.

The previous prime is 12561139. The next prime is 12561163. The reversal of 12561146 is 64116521.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3305 + ... + 6003.

It is an arithmetic number, because the mean of its divisors is an integer number (1275750).

Almost surely, 2^12561146 is an apocalyptic number.

12561146 is a deficient number, since it is larger than the sum of its proper divisors (7850854).

12561146 is a wasteful number, since it uses less digits than its factorization.

12561146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893.

The product of its digits is 1440, while the sum is 26.

The square root of 12561146 is about 3544.1707069497. The cubic root of 12561146 is about 232.4572457708.

Adding to 12561146 its reverse (64116521), we get a palindrome (76677667).

The spelling of 12561146 in words is "twelve million, five hundred sixty-one thousand, one hundred forty-six".