12720524 has 6 divisors (see below), whose sum is σ = 22260924. Its totient is φ = 6360260.

The previous prime is 12720511. The next prime is 12720529. The reversal of 12720524 is 42502721.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12720524.

It is not an unprimeable number, because it can be changed into a prime (12720529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1590062 + ... + 1590069.

It is an arithmetic number, because the mean of its divisors is an integer number (3710154).

Almost surely, 2^12720524 is an apocalyptic number.

It is an amenable number.

12720524 is a deficient number, since it is larger than the sum of its proper divisors (9540400).

12720524 is a wasteful number, since it uses less digits than its factorization.

12720524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180135 (or 3180133 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 12720524 is about 3566.5843604210. The cubic root of 12720524 is about 233.4362693219.

The spelling of 12720524 in words is "twelve million, seven hundred twenty thousand, five hundred twenty-four".