1159071921 has 36 divisors (see below), whose sum is σ = 1949980032. Its totient is φ = 661503024.

The previous prime is 1159071899. The next prime is 1159071937. The reversal of 1159071921 is 1291709511.

It is not a de Polignac number, because 1159071921 - 2⁶ = 1159071857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1159070921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 626620 + ... + 628466.

It is an arithmetic number, because the mean of its divisors is an integer number (54166112).

Almost surely, 2^1159071921 is an apocalyptic number.

It is an amenable number.

1159071921 is a deficient number, since it is larger than the sum of its proper divisors (790908111).

1159071921 is a wasteful number, since it uses less digits than its factorization.

1159071921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3290 (or 3280 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 36.

The square root of 1159071921 is about 34045.1453367437. The cubic root of 1159071921 is about 1050.4372845292.

The spelling of 1159071921 in words is "one billion, one hundred fifty-nine million, seventy-one thousand, nine hundred twenty-one".