2040921 has 6 divisors (see below), whose sum is σ = 2948010. Its totient is φ = 1360608.

The previous prime is 2040919. The next prime is 2040943. The reversal of 2040921 is 1290402.

It can be written as a sum of positive squares in only one way, i.e., 1299600 + 741321 = 1140^2 + 861^2 .

It is not a de Polignac number, because 2040921 - 2¹ = 2040919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2040894 and 2040903.

It is not an unprimeable number, because it can be changed into a prime (2040971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113376 + ... + 113393.

It is an arithmetic number, because the mean of its divisors is an integer number (491335).

2^2040921 is an apocalyptic number.

It is an amenable number.

2040921 is a deficient number, since it is larger than the sum of its proper divisors (907089).

2040921 is a wasteful number, since it uses less digits than its factorization.

2040921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226775 (or 226772 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2040921 is about 1428.6080638160. The cubic root of 2040921 is about 126.8455973831.

The spelling of 2040921 in words is "two million, forty thousand, nine hundred twenty-one".