12724317 has 16 divisors (see below), whose sum is σ = 18981760. Its totient is φ = 8424000.

The previous prime is 12724277. The next prime is 12724331. The reversal of 12724317 is 71342721.

It is a happy number.

It is not a de Polignac number, because 12724317 - 2¹⁹ = 12200029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12720317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2517 + ... + 5637.

It is an arithmetic number, because the mean of its divisors is an integer number (1186360).

Almost surely, 2^12724317 is an apocalyptic number.

It is an amenable number.

12724317 is a deficient number, since it is larger than the sum of its proper divisors (6257443).

12724317 is a wasteful number, since it uses less digits than its factorization.

12724317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281 (or 3275 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 12724317 is about 3567.1160620311. The cubic root of 12724317 is about 233.4594689893.

It can be divided in two parts, 127243 and 17, that added together give a triangular number (127260 = T₅₀₄).

The spelling of 12724317 in words is "twelve million, seven hundred twenty-four thousand, three hundred seventeen".