1159121215 has 24 divisors (see below), whose sum is σ = 1624281120. Its totient is φ = 791759808.

The previous prime is 1159121189. The next prime is 1159121231. The reversal of 1159121215 is 5121219511.

It is not a de Polignac number, because 1159121215 - 2²³ = 1150732607 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55441 + ... + 73429.

It is an arithmetic number, because the mean of its divisors is an integer number (67678380).

Almost surely, 2^1159121215 is an apocalyptic number.

1159121215 is a deficient number, since it is larger than the sum of its proper divisors (465159905).

1159121215 is a wasteful number, since it uses less digits than its factorization.

1159121215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18271 (or 18264 counting only the distinct ones).

The product of its digits is 900, while the sum is 28.

The square root of 1159121215 is about 34045.8692795470. The cubic root of 1159121215 is about 1050.4521756160.

The spelling of 1159121215 in words is "one billion, one hundred fifty-nine million, one hundred twenty-one thousand, two hundred fifteen".