12321522 has 24 divisors (see below), whose sum is σ = 26975676. Its totient is φ = 4064256.

The previous prime is 12321511. The next prime is 12321541. The reversal of 12321522 is 22512321.

12321522 is a `hidden beast` number, since 123 + 21 + 522 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10830681 + 1490841 = 3291^2 + 1221^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12321495 and 12321504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1783 + ... + 5274.

Almost surely, 2^12321522 is an apocalyptic number.

12321522 is an abundant number, since it is smaller than the sum of its proper divisors (14654154).

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

12321522 is a wasteful number, since it uses less digits than its factorization.

12321522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7162 (or 7159 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 12321522 is about 3510.2025582579. The cubic root of 12321522 is about 230.9695805224.

Adding to 12321522 its reverse (22512321), we get a palindrome (34833843).

The spelling of 12321522 in words is "twelve million, three hundred twenty-one thousand, five hundred twenty-two".