1161417885 has 16 divisors (see below), whose sum is σ = 1893331584. Its totient is φ = 607735232.

The previous prime is 1161417877. The next prime is 1161417923. The reversal of 1161417885 is 5887141611.

It is a cyclic number.

It is not a de Polignac number, because 1161417885 - 2³ = 1161417877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 729657 + ... + 731246.

It is an arithmetic number, because the mean of its divisors is an integer number (118333224).

Almost surely, 2^1161417885 is an apocalyptic number.

1161417885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1161417885 is a deficient number, since it is larger than the sum of its proper divisors (731913699).

1161417885 is a wasteful number, since it uses less digits than its factorization.

1161417885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460964.

The product of its digits is 53760, while the sum is 42.

The square root of 1161417885 is about 34079.5816435589. The cubic root of 1161417885 is about 1051.1455026882.

The spelling of 1161417885 in words is "one billion, one hundred sixty-one million, four hundred seventeen thousand, eight hundred eighty-five".