1159227861 has 16 divisors (see below), whose sum is σ = 1686726720. Its totient is φ = 702321920.

The previous prime is 1159227859. The next prime is 1159227877. The reversal of 1159227861 is 1687229511.

It is a cyclic number.

It is not a de Polignac number, because 1159227861 - 2¹ = 1159227859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159223861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161791 + ... + 168803.

It is an arithmetic number, because the mean of its divisors is an integer number (105420420).

Almost surely, 2^1159227861 is an apocalyptic number.

1159227861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1159227861 is a deficient number, since it is larger than the sum of its proper divisors (527498859).

1159227861 is a wasteful number, since it uses less digits than its factorization.

1159227861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12036.

The product of its digits is 60480, while the sum is 42.

The square root of 1159227861 is about 34047.4354540838. The cubic root of 1159227861 is about 1050.4843905634.

The spelling of 1159227861 in words is "one billion, one hundred fifty-nine million, two hundred twenty-seven thousand, eight hundred sixty-one".