1161246905 has 16 divisors (see below), whose sum is σ = 1715073024. Its totient is φ = 735030720.

The previous prime is 1161246871. The next prime is 1161246917. The reversal of 1161246905 is 5096421611.

It is not a de Polignac number, because 1161246905 - 2²⁰ = 1160198329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

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, 1275641 + ... + 1276550.

It is an arithmetic number, because the mean of its divisors is an integer number (107192064).

Almost surely, 2^1161246905 is an apocalyptic number.

It is an amenable number.

1161246905 is a deficient number, since it is larger than the sum of its proper divisors (553826119).

1161246905 is a wasteful number, since it uses less digits than its factorization.

1161246905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552216.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1161246905 is about 34077.0730110437. The cubic root of 1161246905 is about 1051.0939181321.

The spelling of 1161246905 in words is "one billion, one hundred sixty-one million, two hundred forty-six thousand, nine hundred five".