12721701 has 4 divisors (see below), whose sum is σ = 16962272. Its totient is φ = 8481132.

The previous prime is 12721693. The next prime is 12721703. The reversal of 12721701 is 10712721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12721701 - 2³ = 12721693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12721703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2120281 + ... + 2120286.

It is an arithmetic number, because the mean of its divisors is an integer number (4240568).

Almost surely, 2^12721701 is an apocalyptic number.

It is an amenable number.

12721701 is a deficient number, since it is larger than the sum of its proper divisors (4240571).

12721701 is an equidigital number, since it uses as much as digits as its factorization.

12721701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4240570.

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 12721701 is about 3566.7493604121. The cubic root of 12721701 is about 233.4434688685.

The spelling of 12721701 in words is "twelve million, seven hundred twenty-one thousand, seven hundred one".