1171265705 has 16 divisors (see below), whose sum is σ = 1426360320. Its totient is φ = 923180928.

The previous prime is 1171265701. The next prime is 1171265741. The reversal of 1171265705 is 5075621711.

It is a cyclic number.

It is not a de Polignac number, because 1171265705 - 2² = 1171265701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1171265701) 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, 155261 + ... + 162629.

It is an arithmetic number, because the mean of its divisors is an integer number (89147520).

Almost surely, 2^1171265705 is an apocalyptic number.

It is an amenable number.

1171265705 is a deficient number, since it is larger than the sum of its proper divisors (255094615).

1171265705 is an equidigital number, since it uses as much as digits as its factorization.

1171265705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7840.

The product of its (nonzero) digits is 14700, while the sum is 35.

The square root of 1171265705 is about 34223.7593639273. The cubic root of 1171265705 is about 1054.1080801976.

The spelling of 1171265705 in words is "one billion, one hundred seventy-one million, two hundred sixty-five thousand, seven hundred five".