9090121 has 8 divisors (see below), whose sum is σ = 9676800. Its totient is φ = 8509248.

The previous prime is 9090061. The next prime is 9090127. The reversal of 9090121 is 1210909.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9090121 - 2⁹ = 9089609 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9090092 and 9090101.

It is not an unprimeable number, because it can be changed into a prime (9090127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2040 + ... + 4726.

It is an arithmetic number, because the mean of its divisors is an integer number (1209600).

Almost surely, 2^9090121 is an apocalyptic number.

It is an amenable number.

9090121 is a deficient number, since it is larger than the sum of its proper divisors (586679).

9090121 is a wasteful number, since it uses less digits than its factorization.

9090121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2903.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 9090121 is about 3014.9827528528. The cubic root of 9090121 is about 208.7003711487.

The spelling of 9090121 in words is "nine million, ninety thousand, one hundred twenty-one".