117561 has 8 divisors (see below), whose sum is σ = 158400.
Its totient is φ = 77552.
The previous prime is 117541. The next prime is 117563. The reversal of 117561 is 165711.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 117561 - 25 = 117529 is a prime.
It is not an unprimeable number, because it can be changed into a prime (117563) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316 + ... + 578.
It is an arithmetic number, because the mean of its divisors is an integer number (19800).
2117561 is an apocalyptic number.
It is an amenable number.
117561 is a deficient number, since it is larger than the sum of its proper divisors (40839).
117561 is a wasteful number, since it uses less digits than its factorization.
117561 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 415.
The product of its digits is 210, while the sum is 21.
The square root of 117561 is about 342.8716961197.
The cubic root of 117561 is about 48.9877798209.
The spelling of 117561 in words is "one hundred seventeen thousand, five hundred sixty-one".