117642 has 16 divisors (see below), whose sum is σ = 268992. Its totient is φ = 33600.

The previous prime is 117619. The next prime is 117643. The reversal of 117642 is 246711.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a plaindrome in base 15.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (117643) by changing a digit.

117642 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1359 + ... + 1442.

It is an arithmetic number, because the mean of its divisors is an integer number (16812).

117642 is a Friedman number, since it can be written as (4+2+1*1)^6-7, using all its digits and the basic arithmetic operations.

2¹¹⁷⁶⁴² is an apocalyptic number.

117642 is an abundant number, since it is smaller than the sum of its proper divisors (151350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

117642 is a wasteful number, since it uses less digits than its factorization.

117642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813.

The product of its digits is 336, while the sum is 21.

The square root of 117642 is about 342.9897957666. The cubic root of 117642 is about 48.9990281634. Note that the first 3 decimals are identical.

The spelling of 117642 in words is "one hundred seventeen thousand, six hundred forty-two".