1324521491 has 2 divisors, whose sum is σ = 1324521492. Its totient is φ = 1324521490.

The previous prime is 1324521467. The next prime is 1324521511. The reversal of 1324521491 is 1941254231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1324521491 - 2²² = 1320327187 is a prime.

It is not a weakly prime, because it can be changed into another prime (1324521691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662260745 + 662260746.

It is an arithmetic number, because the mean of its divisors is an integer number (662260746).

Almost surely, 2^1324521491 is an apocalyptic number.

1324521491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1324521491 is an equidigital number, since it uses as much as digits as its factorization.

1324521491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 1324521491 is about 36393.9760262602. The cubic root of 1324521491 is about 1098.2123832837.

The spelling of 1324521491 in words is "one billion, three hundred twenty-four million, five hundred twenty-one thousand, four hundred ninety-one".