2820106 has 4 divisors (see below), whose sum is σ = 4230162. Its totient is φ = 1410052.

The previous prime is 2820089. The next prime is 2820109. The reversal of 2820106 is 6010282.

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 only one way, i.e., 2449225 + 370881 = 1565^2 + 609^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2820109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 705025 + ... + 705028.

2^2820106 is an apocalyptic number.

2820106 is a deficient number, since it is larger than the sum of its proper divisors (1410056).

2820106 is a wasteful number, since it uses less digits than its factorization.

2820106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410055.

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

The square root of 2820106 is about 1679.3171231188. The cubic root of 2820106 is about 141.2825345998.

Adding to 2820106 its reverse (6010282), we get a palindrome (8830388).

It can be divided in two parts, 2820 and 106, that added together give a triangular number (2926 = T₇₆).

The spelling of 2820106 in words is "two million, eight hundred twenty thousand, one hundred six".