1232432321 has 4 divisors (see below), whose sum is σ = 1297297200. Its totient is φ = 1167567444.

The previous prime is 1232432293. The next prime is 1232432351. The reversal of 1232432321 is 1232342321.

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 1232432321 - 2¹⁰ = 1232431297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1232432351) 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, 32432411 + ... + 32432448.

It is an arithmetic number, because the mean of its divisors is an integer number (324324300).

Almost surely, 2^1232432321 is an apocalyptic number.

It is an amenable number.

1232432321 is a deficient number, since it is larger than the sum of its proper divisors (64864879).

1232432321 is an equidigital number, since it uses as much as digits as its factorization.

1232432321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64864878.

The product of its digits is 1728, while the sum is 23.

The square root of 1232432321 is about 35106.0154531955. The cubic root of 1232432321 is about 1072.1470618699.

Adding to 1232432321 its reverse (1232342321), we get a palindrome (2464774642).

Subtracting from 1232432321 its reverse (1232342321), we obtain a square (90000 = 300²).

The spelling of 1232432321 in words is "one billion, two hundred thirty-two million, four hundred thirty-two thousand, three hundred twenty-one".