12720249 has 6 divisors (see below), whose sum is σ = 18373706. Its totient is φ = 8480160.

The previous prime is 12720247. The next prime is 12720271. The reversal of 12720249 is 94202721.

It can be written as a sum of positive squares in only one way, i.e., 6594624 + 6125625 = 2568^2 + 2475^2 .

It is not a de Polignac number, because 12720249 - 2¹ = 12720247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12720247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 706672 + ... + 706689.

Almost surely, 2^12720249 is an apocalyptic number.

It is an amenable number.

12720249 is a deficient number, since it is larger than the sum of its proper divisors (5653457).

12720249 is a wasteful number, since it uses less digits than its factorization.

12720249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413367 (or 1413364 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 12720249 is about 3566.5458079212. The cubic root of 12720249 is about 233.4345871208.

The spelling of 12720249 in words is "twelve million, seven hundred twenty thousand, two hundred forty-nine".