8040921 has 16 divisors (see below), whose sum is σ = 12294144. Its totient is φ = 4579344.

The previous prime is 8040919. The next prime is 8040931. The reversal of 8040921 is 1290408.

It is not a de Polignac number, because 8040921 - 2¹ = 8040919 is a prime.

8040921 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8040891 and 8040900.

It is not an unprimeable number, because it can be changed into a prime (8040931) 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, 9310 + ... + 10136.

It is an arithmetic number, because the mean of its divisors is an integer number (768384).

Almost surely, 2^8040921 is an apocalyptic number.

It is an amenable number.

8040921 is a deficient number, since it is larger than the sum of its proper divisors (4253223).

8040921 is a wasteful number, since it uses less digits than its factorization.

8040921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 8040921 is about 2835.6517769289. The cubic root of 8040921 is about 200.3404285466.

The spelling of 8040921 in words is "eight million, forty thousand, nine hundred twenty-one".