117321405 has 8 divisors (see below), whose sum is σ = 187714272. Its totient is φ = 62571408.

The previous prime is 117321331. The next prime is 117321427. The reversal of 117321405 is 504123711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117321405 - 2¹⁰ = 117320381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3910699 + ... + 3910728.

It is an arithmetic number, because the mean of its divisors is an integer number (23464284).

Almost surely, 2^117321405 is an apocalyptic number.

117321405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117321405 is a deficient number, since it is larger than the sum of its proper divisors (70392867).

117321405 is an equidigital number, since it uses as much as digits as its factorization.

117321405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7821435.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 117321405 is about 10831.5005885611. The cubic root of 117321405 is about 489.5447736564.

It can be divided in two parts, 1173 and 21405, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 117321405 in words is "one hundred seventeen million, three hundred twenty-one thousand, four hundred five".