117161145 has 12 divisors (see below), whose sum is σ = 203079396. Its totient is φ = 62485920.

The previous prime is 117161101. The next prime is 117161173. The reversal of 117161145 is 541161711.

117161145 is a `hidden beast` number, since 1 + 1 + 7 + 1 + 611 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 83393424 + 33767721 = 9132^2 + 5811^2 .

It is a de Polignac number, because none of the positive numbers 2^k-117161145 is a prime.

It is a super-2 number, since 2×117161145² = 27453467795422050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1301746 + ... + 1301835.

It is an arithmetic number, because the mean of its divisors is an integer number (16923283).

Almost surely, 2^117161145 is an apocalyptic number.

117161145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117161145 is a deficient number, since it is larger than the sum of its proper divisors (85918251).

117161145 is a wasteful number, since it uses less digits than its factorization.

117161145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603592 (or 2603589 counting only the distinct ones).

The product of its digits is 840, while the sum is 27.

The square root of 117161145 is about 10824.1001935496. The cubic root of 117161145 is about 489.3217674760.

The spelling of 117161145 in words is "one hundred seventeen million, one hundred sixty-one thousand, one hundred forty-five".