108065421 has 10 divisors (see below), whose sum is σ = 161431182. Its totient is φ = 72043560.

The previous prime is 108065417. The next prime is 108065429. The reversal of 108065421 is 124560801.

108065421 is a `hidden beast` number, since 1 + 0 + 8 + 0 + 654 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 62015625 + 46049796 = 7875^2 + 6786^2 .

It is not a de Polignac number, because 108065421 - 2² = 108065417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108065429) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 666990 + ... + 667151.

Almost surely, 2^108065421 is an apocalyptic number.

It is an amenable number.

108065421 is a deficient number, since it is larger than the sum of its proper divisors (53365761).

108065421 is an equidigital number, since it uses as much as digits as its factorization.

108065421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334153 (or 1334144 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 108065421 is about 10395.4519382276. The cubic root of 108065421 is about 476.3164530000.

The spelling of 108065421 in words is "one hundred eight million, sixty-five thousand, four hundred twenty-one".