1232321491 has 2 divisors, whose sum is σ = 1232321492. Its totient is φ = 1232321490.

The previous prime is 1232321473. The next prime is 1232321507. The reversal of 1232321491 is 1941232321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1232321491 - 2¹⁷ = 1232190419 is a prime.

It is not a weakly prime, because it can be changed into another prime (1232321401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616160745 + 616160746.

It is an arithmetic number, because the mean of its divisors is an integer number (616160746).

Almost surely, 2^1232321491 is an apocalyptic number.

1232321491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232321491 is an equidigital number, since it uses as much as digits as its factorization.

1232321491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 1232321491 is about 35104.4369133020. The cubic root of 1232321491 is about 1072.1149222765.

The spelling of 1232321491 in words is "one billion, two hundred thirty-two million, three hundred twenty-one thousand, four hundred ninety-one".