2040981 has 4 divisors (see below), whose sum is σ = 2721312. Its totient is φ = 1360652.

The previous prime is 2040971. The next prime is 2040989. The reversal of 2040981 is 1890402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2040981 - 2⁶ = 2040917 is a prime.

It is a super-2 number, since 2×2040981² = 8331206884722, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2040989) 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 3 ways as a sum of consecutive naturals, for example, 340161 + ... + 340166.

It is an arithmetic number, because the mean of its divisors is an integer number (680328).

2^2040981 is an apocalyptic number.

It is an amenable number.

2040981 is a deficient number, since it is larger than the sum of its proper divisors (680331).

2040981 is an equidigital number, since it uses as much as digits as its factorization.

2040981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680330.

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

The square root of 2040981 is about 1428.6290631231. The cubic root of 2040981 is about 126.8468403940.

The spelling of 2040981 in words is "two million, forty thousand, nine hundred eighty-one".