12442578 has 16 divisors (see below), whose sum is σ = 25142880. Its totient is φ = 4104576.

The previous prime is 12442561. The next prime is 12442601. The reversal of 12442578 is 87524421.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10108 + ... + 11271.

It is an arithmetic number, because the mean of its divisors is an integer number (1571430).

Almost surely, 2^12442578 is an apocalyptic number.

12442578 is an abundant number, since it is smaller than the sum of its proper divisors (12700302).

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

12442578 is a wasteful number, since it uses less digits than its factorization.

12442578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21481.

The product of its digits is 17920, while the sum is 33.

The square root of 12442578 is about 3527.4038611988. The cubic root of 12442578 is about 231.7235237037.

Adding to 12442578 its reverse (87524421), we get a palindrome (99966999).

The spelling of 12442578 in words is "twelve million, four hundred forty-two thousand, five hundred seventy-eight".