1232323721 has 8 divisors (see below), whose sum is σ = 1247051400. Its totient is φ = 1217682432.

The previous prime is 1232323669. The next prime is 1232323747. The reversal of 1232323721 is 1273232321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 207043321 + 1025280400 = 14389^2 + 32020^2 .

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 1232323721 - 2¹⁰ = 1232322697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1232323751) 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, 7331 + ... + 50183.

It is an arithmetic number, because the mean of its divisors is an integer number (155881425).

Almost surely, 2^1232323721 is an apocalyptic number.

It is an amenable number.

1232323721 is a deficient number, since it is larger than the sum of its proper divisors (14727679).

1232323721 is a wasteful number, since it uses less digits than its factorization.

1232323721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43195.

The product of its digits is 3024, while the sum is 26.

The square root of 1232323721 is about 35104.4686756544. The cubic root of 1232323721 is about 1072.1155689733.

The spelling of 1232323721 in words is "one billion, two hundred thirty-two million, three hundred twenty-three thousand, seven hundred twenty-one".