117942181 has 16 divisors (see below), whose sum is σ = 137175040. Its totient is φ = 99318960.

The previous prime is 117942173. The next prime is 117942191. The reversal of 117942181 is 181249711.

117942181 = T₃₃₄₁ + T₃₃₄₂ + ... + T₃₃₆₁.

It is a cyclic number.

It is not a de Polignac number, because 117942181 - 2³ = 117942173 is a prime.

It is a super-2 number, since 2×117942181² = 27820716118073522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117942131) 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, 149470 + ... + 150256.

It is an arithmetic number, because the mean of its divisors is an integer number (8573440).

Almost surely, 2^117942181 is an apocalyptic number.

It is an amenable number.

117942181 is a deficient number, since it is larger than the sum of its proper divisors (19232859).

117942181 is an equidigital number, since it uses as much as digits as its factorization.

117942181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144.

The product of its digits is 4032, while the sum is 34.

The square root of 117942181 is about 10860.1188299208. The cubic root of 117942181 is about 490.4066886036.

The spelling of 117942181 in words is "one hundred seventeen million, nine hundred forty-two thousand, one hundred eighty-one".