12724522 has 16 divisors (see below), whose sum is σ = 19697832. Its totient is φ = 6160320.

The previous prime is 12724519. The next prime is 12724531. The reversal of 12724522 is 22542721.

It can be written as a sum of positive squares in 4 ways, for example, as 12033961 + 690561 = 3469^2 + 831^2 .

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, 27372 + ... + 27832.

Almost surely, 2^12724522 is an apocalyptic number.

12724522 is a deficient number, since it is larger than the sum of its proper divisors (6973310).

12724522 is a wasteful number, since it uses less digits than its factorization.

12724522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873.

The product of its digits is 2240, while the sum is 25.

The square root of 12724522 is about 3567.1447966126. The cubic root of 12724522 is about 233.4607227288.

It can be divided in two parts, 127 and 24522, that added together give a square (24649 = 157²).

The spelling of 12724522 in words is "twelve million, seven hundred twenty-four thousand, five hundred twenty-two".