12721697 has 8 divisors (see below), whose sum is σ = 13490400. Its totient is φ = 11962944.

The previous prime is 12721693. The next prime is 12721703. The reversal of 12721697 is 79612721.

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

It is a cyclic number.

It is not a de Polignac number, because 12721697 - 2² = 12721693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12721693) 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, 233 + ... + 5049.

It is an arithmetic number, because the mean of its divisors is an integer number (1686300).

Almost surely, 2^12721697 is an apocalyptic number.

It is an amenable number.

12721697 is a deficient number, since it is larger than the sum of its proper divisors (768703).

12721697 is a wasteful number, since it uses less digits than its factorization.

12721697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4975.

The product of its digits is 10584, while the sum is 35.

The square root of 12721697 is about 3566.7487996774. The cubic root of 12721697 is about 233.4434444018.

The spelling of 12721697 in words is "twelve million, seven hundred twenty-one thousand, six hundred ninety-seven".