12283721 has 4 divisors (see below), whose sum is σ = 12405444. Its totient is φ = 12162000.

The previous prime is 12283717. The next prime is 12283727. The reversal of 12283721 is 12738221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7639696 + 4644025 = 2764^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 12283721 - 2² = 12283717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12283727) 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, 60710 + ... + 60911.

It is an arithmetic number, because the mean of its divisors is an integer number (3101361).

Almost surely, 2^12283721 is an apocalyptic number.

It is an amenable number.

12283721 is a deficient number, since it is larger than the sum of its proper divisors (121723).

12283721 is a wasteful number, since it uses less digits than its factorization.

12283721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121722.

The product of its digits is 1344, while the sum is 26.

The square root of 12283721 is about 3504.8139750920. The cubic root of 12283721 is about 230.7331426103.

The spelling of 12283721 in words is "twelve million, two hundred eighty-three thousand, seven hundred twenty-one".