117621 has 12 divisors (see below), whose sum is σ = 194272. Its totient is φ = 67176.

The previous prime is 117619. The next prime is 117643. The reversal of 117621 is 126711.

It is not a de Polignac number, because 117621 - 2¹ = 117619 is a prime.

It is a Duffinian number.

It is a Curzon number.

117621 is a lucky number.

It is a nialpdrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 117594 and 117603.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 117621.

It is not an unprimeable number, because it can be changed into a prime (117671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 871 + ... + 996.

2¹¹⁷⁶²¹ is an apocalyptic number.

It is an amenable number.

117621 is a deficient number, since it is larger than the sum of its proper divisors (76651).

117621 is a wasteful number, since it uses less digits than its factorization.

117621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880 (or 1877 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 117621 is about 342.9591812446. The cubic root of 117621 is about 48.9961124224.

The spelling of 117621 in words is "one hundred seventeen thousand, six hundred twenty-one".