1155340729 has 2 divisors, whose sum is σ = 1155340730. Its totient is φ = 1155340728.

The previous prime is 1155340709. The next prime is 1155340751. The reversal of 1155340729 is 9270435511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1048011129 + 107329600 = 32373^2 + 10360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155340729 - 2²⁷ = 1021123001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155340709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577670364 + 577670365.

It is an arithmetic number, because the mean of its divisors is an integer number (577670365).

Almost surely, 2^1155340729 is an apocalyptic number.

It is an amenable number.

1155340729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155340729 is an equidigital number, since it uses as much as digits as its factorization.

1155340729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 1155340729 is about 33990.3034555445. The cubic root of 1155340729 is about 1049.3089115283.

The spelling of 1155340729 in words is "one billion, one hundred fifty-five million, three hundred forty thousand, seven hundred twenty-nine".