117965421 has 24 divisors (see below), whose sum is σ = 195359424. Its totient is φ = 67193280.

The previous prime is 117965411. The next prime is 117965443. The reversal of 117965421 is 124569711.

117965421 is a `hidden beast` number, since 1 + 179 + 65 + 421 = 666.

It is not a de Polignac number, because 117965421 - 2¹⁷ = 117834349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117965411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18025 + ... + 23681.

It is an arithmetic number, because the mean of its divisors is an integer number (8139976).

Almost surely, 2^117965421 is an apocalyptic number.

It is an amenable number.

117965421 is a deficient number, since it is larger than the sum of its proper divisors (77394003).

117965421 is a wasteful number, since it uses less digits than its factorization.

117965421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6001 (or 5998 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 117965421 is about 10861.1887470939. The cubic root of 117965421 is about 490.4388973318.

The spelling of 117965421 in words is "one hundred seventeen million, nine hundred sixty-five thousand, four hundred twenty-one".