2040645 has 8 divisors (see below), whose sum is σ = 3265056. Its totient is φ = 1088336.

The previous prime is 2040641. The next prime is 2040653. The reversal of 2040645 is 5460402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2040645 - 2² = 2040641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2040641) 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 7 ways as a sum of consecutive naturals, for example, 68007 + ... + 68036.

It is an arithmetic number, because the mean of its divisors is an integer number (408132).

2^2040645 is an apocalyptic number.

It is an amenable number.

2040645 is a deficient number, since it is larger than the sum of its proper divisors (1224411).

2040645 is a wasteful number, since it uses less digits than its factorization.

2040645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136051.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 2040645 is about 1428.5114630272. The cubic root of 2040645 is about 126.8398792191.

The spelling of 2040645 in words is "two million, forty thousand, six hundred forty-five".