2075821 has 4 divisors (see below), whose sum is σ = 2264544. Its totient is φ = 1887100.

The previous prime is 2075813. The next prime is 2075831. The reversal of 2075821 is 1285702.

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 2075821 - 2³ = 2075813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2075831) 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, 94345 + ... + 94366.

It is an arithmetic number, because the mean of its divisors is an integer number (566136).

2^2075821 is an apocalyptic number.

It is an amenable number.

2075821 is a deficient number, since it is larger than the sum of its proper divisors (188723).

2075821 is a wasteful number, since it uses less digits than its factorization.

2075821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188722.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 2075821 is about 1440.7709741663. The cubic root of 2075821 is about 127.5645399250.

The spelling of 2075821 in words is "two million, seventy-five thousand, eight hundred twenty-one".