1232782321 has 3 divisors (see below), whose sum is σ = 1232817433. Its totient is φ = 1232747210.

The previous prime is 1232782303. The next prime is 1232782333. The reversal of 1232782321 is 1232872321.

The square root of 1232782321 is 35111.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-1232782321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232782361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 17556 + ... + 52666.

Almost surely, 2^1232782321 is an apocalyptic number.

1232782321 is the 35111-st square number.

1232782321 is the 17556-th centered octagonal number.

It is an amenable number.

1232782321 is a deficient number, since it is larger than the sum of its proper divisors (35112).

1232782321 is an frugal number, since it uses more digits than its factorization.

1232782321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70222 (or 35111 counting only the distinct ones).

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

The cubic root of 1232782321 is about 1072.2485457265.

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

The spelling of 1232782321 in words is "one billion, two hundred thirty-two million, seven hundred eighty-two thousand, three hundred twenty-one".