1321147459 has 2 divisors, whose sum is σ = 1321147460. Its totient is φ = 1321147458.

The previous prime is 1321147447. The next prime is 1321147489. The reversal of 1321147459 is 9547411231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321147459 - 2⁹ = 1321146947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321147489) 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 as a sum of consecutive naturals, namely, 660573729 + 660573730.

It is an arithmetic number, because the mean of its divisors is an integer number (660573730).

Almost surely, 2^1321147459 is an apocalyptic number.

1321147459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321147459 is an equidigital number, since it uses as much as digits as its factorization.

1321147459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 1321147459 is about 36347.5922036110. The cubic root of 1321147459 is about 1097.2790765409.

The spelling of 1321147459 in words is "one billion, three hundred twenty-one million, one hundred forty-seven thousand, four hundred fifty-nine".