12722361 has 4 divisors (see below), whose sum is σ = 16963152. Its totient is φ = 8481572.

The previous prime is 12722357. The next prime is 12722377. The reversal of 12722361 is 16322721.

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 a cyclic number.

It is not a de Polignac number, because 12722361 - 2² = 12722357 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12722321) 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, 2120391 + ... + 2120396.

It is an arithmetic number, because the mean of its divisors is an integer number (4240788).

Almost surely, 2^12722361 is an apocalyptic number.

It is an amenable number.

12722361 is a deficient number, since it is larger than the sum of its proper divisors (4240791).

12722361 is an equidigital number, since it uses as much as digits as its factorization.

12722361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4240790.

The product of its digits is 1008, while the sum is 24.

The square root of 12722361 is about 3566.8418804315. The cubic root of 12722361 is about 233.4475058031.

The spelling of 12722361 in words is "twelve million, seven hundred twenty-two thousand, three hundred sixty-one".