12440522 has 4 divisors (see below), whose sum is σ = 18660786. Its totient is φ = 6220260.

The previous prime is 12440521. The next prime is 12440537. The reversal of 12440522 is 22504421.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 6295081 + 6145441 = 2509^2 + 2479^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12440494 and 12440503.

It is not an unprimeable number, because it can be changed into a prime (12440521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3110129 + ... + 3110132.

Almost surely, 2^12440522 is an apocalyptic number.

12440522 is a deficient number, since it is larger than the sum of its proper divisors (6220264).

12440522 is an equidigital number, since it uses as much as digits as its factorization.

12440522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6220263.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 12440522 is about 3527.1124166944. The cubic root of 12440522 is about 231.7107597409.

Adding to 12440522 its reverse (22504421), we get a palindrome (34944943).

The spelling of 12440522 in words is "twelve million, four hundred forty thousand, five hundred twenty-two".