1122155729 has 2 divisors, whose sum is σ = 1122155730. Its totient is φ = 1122155728.

The previous prime is 1122155693. The next prime is 1122155777. The reversal of 1122155729 is 9275512211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 834921025 + 287234704 = 28895^2 + 16948^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122155729 - 2²⁰ = 1121107153 is a prime.

It is not a weakly prime, because it can be changed into another prime (1122155779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561077864 + 561077865.

It is an arithmetic number, because the mean of its divisors is an integer number (561077865).

Almost surely, 2^1122155729 is an apocalyptic number.

It is an amenable number.

1122155729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122155729 is an equidigital number, since it uses as much as digits as its factorization.

1122155729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 35.

The square root of 1122155729 is about 33498.5929405998. The cubic root of 1122155729 is about 1039.1646796633.

The spelling of 1122155729 in words is "one billion, one hundred twenty-two million, one hundred fifty-five thousand, seven hundred twenty-nine".