108421605 has 32 divisors (see below), whose sum is σ = 193190400. Its totient is φ = 57692736.

The previous prime is 108421603. The next prime is 108421613. The reversal of 108421605 is 506124801.

108421605 is a `hidden beast` number, since 10 + 8 + 42 + 1 + 605 = 666.

It is not a de Polignac number, because 108421605 - 2¹ = 108421603 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 (108421603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96507 + ... + 97623.

It is an arithmetic number, because the mean of its divisors is an integer number (6037200).

Almost surely, 2^108421605 is an apocalyptic number.

108421605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

108421605 is a deficient number, since it is larger than the sum of its proper divisors (84768795).

108421605 is a wasteful number, since it uses less digits than its factorization.

108421605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850 (or 1844 counting only the distinct ones).

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

The square root of 108421605 is about 10412.5695675947. The cubic root of 108421605 is about 476.8391926596.

The spelling of 108421605 in words is "one hundred eight million, four hundred twenty-one thousand, six hundred five".