12720849 has 8 divisors (see below), whose sum is σ = 17129472. Its totient is φ = 8396400.

The previous prime is 12720847. The next prime is 12720887. The reversal of 12720849 is 94802721.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12720849 - 2¹ = 12720847 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12720847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20689 + ... + 21294.

It is an arithmetic number, because the mean of its divisors is an integer number (2141184).

Almost surely, 2^12720849 is an apocalyptic number.

It is an amenable number.

12720849 is a deficient number, since it is larger than the sum of its proper divisors (4408623).

12720849 is a wasteful number, since it uses less digits than its factorization.

12720849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42087.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 12720849 is about 3566.6299219291. The cubic root of 12720849 is about 233.4382573464.

The spelling of 12720849 in words is "twelve million, seven hundred twenty thousand, eight hundred forty-nine".