117542165 has 16 divisors (see below), whose sum is σ = 160837488. Its totient is φ = 81693696.

The previous prime is 117542149. The next prime is 117542179. The reversal of 117542165 is 561245711.

It can be written as a sum of positive squares in 8 ways, for example, as 24940036 + 92602129 = 4994^2 + 9623^2 .

It is a cyclic number.

It is not a de Polignac number, because 117542165 - 2⁴ = 117542149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52082 + ... + 54291.

It is an arithmetic number, because the mean of its divisors is an integer number (10052343).

Almost surely, 2^117542165 is an apocalyptic number.

It is an amenable number.

117542165 is a deficient number, since it is larger than the sum of its proper divisors (43295323).

117542165 is a wasteful number, since it uses less digits than its factorization.

117542165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106408.

The product of its digits is 8400, while the sum is 32.

The square root of 117542165 is about 10841.6864463053. The cubic root of 117542165 is about 489.8516349373.

Adding to 117542165 its reverse (561245711), we get a palindrome (678787876).

The spelling of 117542165 in words is "one hundred seventeen million, five hundred forty-two thousand, one hundred sixty-five".