12720744 has 24 divisors (see below), whose sum is σ = 34452210. Its totient is φ = 4240224.

The previous prime is 12720737. The next prime is 12720751. The reversal of 12720744 is 44702721.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12720737) and next prime (12720751).

It can be written as a sum of positive squares in only one way, i.e., 9998244 + 2722500 = 3162^2 + 1650^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88267 + ... + 88410.

Almost surely, 2^12720744 is an apocalyptic number.

It is an amenable number.

12720744 is an abundant number, since it is smaller than the sum of its proper divisors (21731466).

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

12720744 is a wasteful number, since it uses less digits than its factorization.

12720744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176689 (or 176682 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 12720744 is about 3566.6152021209. The cubic root of 12720744 is about 233.4376150653.

The spelling of 12720744 in words is "twelve million, seven hundred twenty thousand, seven hundred forty-four".