1321146469 has 2 divisors, whose sum is σ = 1321146470. Its totient is φ = 1321146468.

The previous prime is 1321146461. The next prime is 1321146493. The reversal of 1321146469 is 9646411231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1284362244 + 36784225 = 35838^2 + 6065^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321146469 - 2³ = 1321146461 is a prime.

It is a super-2 number, since 2×1321146469² = 3490855985102335922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321146461) 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, 660573234 + 660573235.

It is an arithmetic number, because the mean of its divisors is an integer number (660573235).

Almost surely, 2^1321146469 is an apocalyptic number.

It is an amenable number.

1321146469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321146469 is an equidigital number, since it uses as much as digits as its factorization.

1321146469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The square root of 1321146469 is about 36347.5785850997. The cubic root of 1321146469 is about 1097.2788024593.

The spelling of 1321146469 in words is "one billion, three hundred twenty-one million, one hundred forty-six thousand, four hundred sixty-nine".