12722401 has 4 divisors (see below), whose sum is σ = 12729600. Its totient is φ = 12715204.

The previous prime is 12722393. The next prime is 12722417. The reversal of 12722401 is 10422721.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12722401 - 2³ = 12722393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12792401) 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, 1080 + ... + 5158.

It is an arithmetic number, because the mean of its divisors is an integer number (3182400).

Almost surely, 2^12722401 is an apocalyptic number.

It is an amenable number.

12722401 is a deficient number, since it is larger than the sum of its proper divisors (7199).

12722401 is an equidigital number, since it uses as much as digits as its factorization.

12722401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7198.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12722401 is about 3566.8474876283. The cubic root of 12722401 is about 233.4477504613.

The spelling of 12722401 in words is "twelve million, seven hundred twenty-two thousand, four hundred one".