1232321656 has 32 divisors (see below), whose sum is σ = 2357586000. Its totient is φ = 603665920.

The previous prime is 1232321647. The next prime is 1232321663. The reversal of 1232321656 is 6561232321.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 371895 + ... + 375193.

Almost surely, 2^1232321656 is an apocalyptic number.

It is an amenable number.

1232321656 is a deficient number, since it is larger than the sum of its proper divisors (1125264344).

1232321656 is a wasteful number, since it uses less digits than its factorization.

1232321656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239 (or 4235 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 1232321656 is about 35104.4392634322. The cubic root of 1232321656 is about 1072.1149701263.

Adding to 1232321656 its reverse (6561232321), we get a palindrome (7793553977).

The spelling of 1232321656 in words is "one billion, two hundred thirty-two million, three hundred twenty-one thousand, six hundred fifty-six".