12442566 has 32 divisors (see below), whose sum is σ = 26357760. Its totient is φ = 3909024.

The previous prime is 12442561. The next prime is 12442601. The reversal of 12442566 is 66524421.

12442566 is a nontrivial binomial coefficient, being equal to C(4989, 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12442561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6651 + ... + 8313.

It is an arithmetic number, because the mean of its divisors is an integer number (823680).

Almost surely, 2^12442566 is an apocalyptic number.

12442566 is the 4988-th triangular number.

12442566 is an abundant number, since it is smaller than the sum of its proper divisors (13915194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12442566 is a wasteful number, since it uses less digits than its factorization.

12442566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740.

The product of its digits is 11520, while the sum is 30.

The square root of 12442566 is about 3527.4021602307. The cubic root of 12442566 is about 231.7234492100.

Adding to 12442566 its reverse (66524421), we get a palindrome (78966987).

The spelling of 12442566 in words is "twelve million, four hundred forty-two thousand, five hundred sixty-six".