117681142 has 4 divisors (see below), whose sum is σ = 176521716. Its totient is φ = 58840570.

The previous prime is 117681131. The next prime is 117681143. The reversal of 117681142 is 241186711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241186711 = 1069 ⋅225619.

It is a super-4 number, since 4×117681142⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117681143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29420284 + ... + 29420287.

It is an arithmetic number, because the mean of its divisors is an integer number (44130429).

Almost surely, 2^117681142 is an apocalyptic number.

117681142 is a deficient number, since it is larger than the sum of its proper divisors (58840574).

117681142 is an equidigital number, since it uses as much as digits as its factorization.

117681142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58840573.

The product of its digits is 2688, while the sum is 31.

The square root of 117681142 is about 10848.0939339591. The cubic root of 117681142 is about 490.0446190106.

The spelling of 117681142 in words is "one hundred seventeen million, six hundred eighty-one thousand, one hundred forty-two".