9051921 has 12 divisors (see below), whose sum is σ = 13111540. Its totient is φ = 6017760.

The previous prime is 9051919. The next prime is 9051929. The reversal of 9051921 is 1291509.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 705600 + 8346321 = 840^2 + 2889^2 .

It is not a de Polignac number, because 9051921 - 2¹ = 9051919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9051929) 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, 2595 + ... + 4983.

Almost surely, 2^9051921 is an apocalyptic number.

It is an amenable number.

9051921 is a deficient number, since it is larger than the sum of its proper divisors (4059619).

9051921 is a wasteful number, since it uses less digits than its factorization.

9051921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2816 (or 2813 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 9051921 is about 3008.6410553604. The cubic root of 9051921 is about 208.4076156800.

The spelling of 9051921 in words is "nine million, fifty-one thousand, nine hundred twenty-one".