1155520959 has 8 divisors (see below), whose sum is σ = 1566808320. Its totient is φ = 757290456.

The previous prime is 1155520931. The next prime is 1155520969. The reversal of 1155520959 is 9590255511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1155520959 - 2¹⁶ = 1155455423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1155520959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155520969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3264007 + ... + 3264360.

It is an arithmetic number, because the mean of its divisors is an integer number (195851040).

Almost surely, 2^1155520959 is an apocalyptic number.

1155520959 is a deficient number, since it is larger than the sum of its proper divisors (411287361).

1155520959 is an equidigital number, since it uses as much as digits as its factorization.

1155520959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6528429.

The product of its (nonzero) digits is 101250, while the sum is 42.

The square root of 1155520959 is about 33992.9545494357. The cubic root of 1155520959 is about 1049.3634717999.

The spelling of 1155520959 in words is "one billion, one hundred fifty-five million, five hundred twenty thousand, nine hundred fifty-nine".