12303721 has 8 divisors (see below), whose sum is σ = 12688200. Its totient is φ = 11922048.

The previous prime is 12303713. The next prime is 12303727. The reversal of 12303721 is 12730321.

It can be written as a sum of positive squares in 4 ways, for example, as 3748096 + 8555625 = 1936^2 + 2925^2 .

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 12303721 - 2³ = 12303713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12303727) 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, 11205 + ... + 12253.

It is an arithmetic number, because the mean of its divisors is an integer number (1586025).

Almost surely, 2^12303721 is an apocalyptic number.

It is an amenable number.

12303721 is a deficient number, since it is larger than the sum of its proper divisors (384479).

12303721 is a wasteful number, since it uses less digits than its factorization.

12303721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 12303721 is about 3507.6660331337. Note that the first 3 decimals coincide. The cubic root of 12303721 is about 230.8582990573.

The spelling of 12303721 in words is "twelve million, three hundred three thousand, seven hundred twenty-one".