9118021 has 16 divisors (see below), whose sum is σ = 10473408. Its totient is φ = 7862400.

The previous prime is 9118019. The next prime is 9118027. The reversal of 9118021 is 1208119.

It is a cyclic number.

It is not a de Polignac number, because 9118021 - 2¹ = 9118019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9117983 and 9118001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9118027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17241 + ... + 17761.

It is an arithmetic number, because the mean of its divisors is an integer number (654588).

Almost surely, 2^9118021 is an apocalyptic number.

It is an amenable number.

9118021 is a deficient number, since it is larger than the sum of its proper divisors (1355387).

9118021 is a wasteful number, since it uses less digits than its factorization.

9118021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 9118021 is about 3019.6061001396. The cubic root of 9118021 is about 208.9136720612.

The spelling of 9118021 in words is "nine million, one hundred eighteen thousand, twenty-one".