9120081 has 16 divisors (see below), whose sum is σ = 12700800. Its totient is φ = 5815680.

The previous prime is 9120079. The next prime is 9120091. The reversal of 9120081 is 1800219.

It is not a de Polignac number, because 9120081 - 2¹ = 9120079 is a prime.

It is a super-2 number, since 2×9120081² = 166351754893122, which contains 22 as substring.

It is an Ulam number.

9120081 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9120011) 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, 5820 + ... + 7218.

It is an arithmetic number, because the mean of its divisors is an integer number (793800).

Almost surely, 2^9120081 is an apocalyptic number.

It is an amenable number.

9120081 is a deficient number, since it is larger than the sum of its proper divisors (3580719).

9120081 is a wasteful number, since it uses less digits than its factorization.

9120081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 9120081 is about 3019.9471849686. The cubic root of 9120081 is about 208.9294039018.

The spelling of 9120081 in words is "nine million, one hundred twenty thousand, eighty-one".