909121 has 12 divisors (see below), whose sum is σ = 1003392. Its totient is φ = 821744.

The previous prime is 909119. The next prime is 909133. The reversal of 909121 is 121909.

It is not a de Polignac number, because 909121 - 2¹ = 909119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 909092 and 909101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (909151) 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, 19320 + ... + 19366.

It is an arithmetic number, because the mean of its divisors is an integer number (83616).

2⁹⁰⁹¹²¹ is an apocalyptic number.

It is an amenable number.

909121 is a deficient number, since it is larger than the sum of its proper divisors (94271).

909121 is a wasteful number, since it uses less digits than its factorization.

909121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 99 counting only the distinct ones).

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

The square root of 909121 is about 953.4783689209. The cubic root of 909121 is about 96.8739994347.

The spelling of 909121 in words is "nine hundred nine thousand, one hundred twenty-one".