1155321269 has 2 divisors, whose sum is σ = 1155321270. Its totient is φ = 1155321268.

The previous prime is 1155321229. The next prime is 1155321281. The reversal of 1155321269 is 9621235511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1030731025 + 124590244 = 32105^2 + 11162^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155321269 is a prime.

It is a super-2 number, since 2×1155321269² = 2669534469207540722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155321229) 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, 577660634 + 577660635.

It is an arithmetic number, because the mean of its divisors is an integer number (577660635).

Almost surely, 2^1155321269 is an apocalyptic number.

It is an amenable number.

1155321269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155321269 is an equidigital number, since it uses as much as digits as its factorization.

1155321269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 35.

The square root of 1155321269 is about 33990.0171962298. The cubic root of 1155321269 is about 1049.3030201447.

The spelling of 1155321269 in words is "one billion, one hundred fifty-five million, three hundred twenty-one thousand, two hundred sixty-nine".