117291 has 4 divisors (see below), whose sum is σ = 156392. Its totient is φ = 78192.

The previous prime is 117281. The next prime is 117307. The reversal of 117291 is 192711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192711 = 3 ⋅64237.

It is not a de Polignac number, because 117291 - 2⁵ = 117259 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19546 + ... + 19551.

It is an arithmetic number, because the mean of its divisors is an integer number (39098).

2¹¹⁷²⁹¹ is an apocalyptic number.

117291 is a deficient number, since it is larger than the sum of its proper divisors (39101).

117291 is an equidigital number, since it uses as much as digits as its factorization.

117291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39100.

The product of its digits is 126, while the sum is 21.

The square root of 117291 is about 342.4777365027. The cubic root of 117291 is about 48.9502479883.

The spelling of 117291 in words is "one hundred seventeen thousand, two hundred ninety-one".