1232872321 has 2 divisors, whose sum is σ = 1232872322. Its totient is φ = 1232872320.

The previous prime is 1232872313. The next prime is 1232872327. The reversal of 1232872321 is 1232782321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1232782321 + 90000 = 35111^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232872321 - 2³ = 1232872313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1232872327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616436160 + 616436161.

It is an arithmetic number, because the mean of its divisors is an integer number (616436161).

Almost surely, 2^1232872321 is an apocalyptic number.

It is an amenable number.

1232872321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232872321 is an equidigital number, since it uses as much as digits as its factorization.

1232872321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 31.

The square root of 1232872321 is about 35112.2816262344. The cubic root of 1232872321 is about 1072.2746384705.

Subtracting from 1232872321 its reverse (1232782321), we obtain a square (90000 = 300²).

The spelling of 1232872321 in words is "one billion, two hundred thirty-two million, eight hundred seventy-two thousand, three hundred twenty-one".