12564142 has 4 divisors (see below), whose sum is σ = 18846216. Its totient is φ = 6282070.

The previous prime is 12564137. The next prime is 12564143. The reversal of 12564142 is 24146521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12564143) 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 as a sum of consecutive naturals, namely, 3141034 + ... + 3141037.

It is an arithmetic number, because the mean of its divisors is an integer number (4711554).

Almost surely, 2^12564142 is an apocalyptic number.

12564142 is a deficient number, since it is larger than the sum of its proper divisors (6282074).

12564142 is an equidigital number, since it uses as much as digits as its factorization.

12564142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6282073.

The product of its digits is 1920, while the sum is 25.

The square root of 12564142 is about 3544.5933476211. The cubic root of 12564142 is about 232.4757256809.

The spelling of 12564142 in words is "twelve million, five hundred sixty-four thousand, one hundred forty-two".