12561284 has 6 divisors (see below), whose sum is σ = 21982254. Its totient is φ = 6280640.

The previous prime is 12561257. The next prime is 12561287. The reversal of 12561284 is 48216521.

It can be written as a sum of positive squares in only one way, i.e., 9241600 + 3319684 = 3040^2 + 1822^2 .

It is not an unprimeable number, because it can be changed into a prime (12561287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1570157 + ... + 1570164.

It is an arithmetic number, because the mean of its divisors is an integer number (3663709).

Almost surely, 2^12561284 is an apocalyptic number.

It is an amenable number.

12561284 is a deficient number, since it is larger than the sum of its proper divisors (9420970).

12561284 is a wasteful number, since it uses less digits than its factorization.

12561284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140325 (or 3140323 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 12561284 is about 3544.1901754844. The cubic root of 12561284 is about 232.4580970462.

The spelling of 12561284 in words is "twelve million, five hundred sixty-one thousand, two hundred eighty-four".