2106646 has 8 divisors (see below), whose sum is σ = 3192840. Its totient is φ = 1042368.

The previous prime is 2106631. The next prime is 2106653. The reversal of 2106646 is 6466012.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2106646.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 5236 + ... + 5623.

It is an arithmetic number, because the mean of its divisors is an integer number (399105).

2^2106646 is an apocalyptic number.

2106646 is a deficient number, since it is larger than the sum of its proper divisors (1086194).

2106646 is a wasteful number, since it uses less digits than its factorization.

2106646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10958.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2106646 is about 1451.4289510686. The cubic root of 2106646 is about 128.1928651771.

It can be divided in two parts, 21066 and 46, that added together give a palindrome (21112).

The spelling of 2106646 in words is "two million, one hundred six thousand, six hundred forty-six".