2040081 has 4 divisors (see below), whose sum is σ = 2720112. Its totient is φ = 1360052.

The previous prime is 2040053. The next prime is 2040089. The reversal of 2040081 is 1800402.

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 2040081 - 2¹⁰ = 2039057 is a prime.

It is a super-2 number, since 2×2040081² = 8323860973122, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Curzon number.

2040081 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2040081.

It is not an unprimeable number, because it can be changed into a prime (2040089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340011 + ... + 340016.

It is an arithmetic number, because the mean of its divisors is an integer number (680028).

2^2040081 is an apocalyptic number.

It is an amenable number.

2040081 is a deficient number, since it is larger than the sum of its proper divisors (680031).

2040081 is an equidigital number, since it uses as much as digits as its factorization.

2040081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680030.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2040081 is about 1428.3140410988. The cubic root of 2040081 is about 126.8281926717.

Adding to 2040081 its reverse (1800402), we get a palindrome (3840483).

The spelling of 2040081 in words is "two million, forty thousand, eighty-one".