117842 has 4 divisors (see below), whose sum is σ = 176766. Its totient is φ = 58920.

The previous prime is 117841. The next prime is 117851. The reversal of 117842 is 248711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248711 = 73 ⋅3407.

It can be written as a sum of positive squares in only one way, i.e., 109561 + 8281 = 331^2 + 91^2 .

It is not an unprimeable number, because it can be changed into a prime (117841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29459 + ... + 29462.

2¹¹⁷⁸⁴² is an apocalyptic number.

117842 is a deficient number, since it is larger than the sum of its proper divisors (58924).

117842 is an equidigital number, since it uses as much as digits as its factorization.

117842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58923.

The product of its digits is 448, while the sum is 23.

The square root of 117842 is about 343.2812258193. The cubic root of 117842 is about 49.0267797527.

It can be divided in two parts, 117 and 842, that added together give a palindrome (959).

The spelling of 117842 in words is "one hundred seventeen thousand, eight hundred forty-two".