108605021 has 12 divisors (see below), whose sum is σ = 126516060. Its totient is φ = 92957760.

The previous prime is 108604999. The next prime is 108605033. The reversal of 108605021 is 120506801.

It can be written as a sum of positive squares in 2 ways, for example, as 84732025 + 23872996 = 9205^2 + 4886^2 .

It is not a de Polignac number, because 108605021 - 2¹⁴ = 108588637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108605041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50945 + ... + 53033.

It is an arithmetic number, because the mean of its divisors is an integer number (10543005).

Almost surely, 2^108605021 is an apocalyptic number.

It is an amenable number.

108605021 is a deficient number, since it is larger than the sum of its proper divisors (17911039).

108605021 is a wasteful number, since it uses less digits than its factorization.

108605021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3164 (or 3157 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 108605021 is about 10421.3732780282. The cubic root of 108605021 is about 477.1079295816.

The spelling of 108605021 in words is "one hundred eight million, six hundred five thousand, twenty-one".