2820061 has 4 divisors (see below), whose sum is σ = 2831292. Its totient is φ = 2808832.

The previous prime is 2820043. The next prime is 2820071. The reversal of 2820061 is 1600282.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2343961 + 476100 = 1531^2 + 690^2 .

It is a cyclic number.

It is not a de Polignac number, because 2820061 - 2⁷ = 2819933 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 (2820001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5230 + ... + 5743.

It is an arithmetic number, because the mean of its divisors is an integer number (707823).

2^2820061 is an apocalyptic number.

It is an amenable number.

2820061 is a deficient number, since it is larger than the sum of its proper divisors (11231).

2820061 is a wasteful number, since it uses less digits than its factorization.

2820061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11230.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2820061 is about 1679.3037247621. The cubic root of 2820061 is about 141.2817831212.

The spelling of 2820061 in words is "two million, eight hundred twenty thousand, sixty-one".