12421522 has 8 divisors (see below), whose sum is σ = 18660096. Its totient is φ = 6201492.

The previous prime is 12421517. The next prime is 12421537. The reversal of 12421522 is 22512421.

12421522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12421522.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2818 + ... + 5725.

It is an arithmetic number, because the mean of its divisors is an integer number (2332512).

Almost surely, 2^12421522 is an apocalyptic number.

12421522 is a deficient number, since it is larger than the sum of its proper divisors (6238574).

12421522 is an equidigital number, since it uses as much as digits as its factorization.

12421522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9272.

The product of its digits is 320, while the sum is 19.

The square root of 12421522 is about 3524.4179661328. The cubic root of 12421522 is about 231.5927382301.

Adding to 12421522 its reverse (22512421), we get a palindrome (34933943).

The spelling of 12421522 in words is "twelve million, four hundred twenty-one thousand, five hundred twenty-two".