2081606 has 4 divisors (see below), whose sum is σ = 3122412. Its totient is φ = 1040802.

The previous prime is 2081603. The next prime is 2081609. The reversal of 2081606 is 6061802.

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

It is an interprime number because it is at equal distance from previous prime (2081603) and next prime (2081609).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520400 + ... + 520403.

It is an arithmetic number, because the mean of its divisors is an integer number (780603).

2^2081606 is an apocalyptic number.

2081606 is a deficient number, since it is larger than the sum of its proper divisors (1040806).

2081606 is a wasteful number, since it uses less digits than its factorization.

2081606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040805.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2081606 is about 1442.7771830744. Note that the first 3 decimals coincide. The cubic root of 2081606 is about 127.6829310570.

The spelling of 2081606 in words is "two million, eighty-one thousand, six hundred six".