2106439 has 4 divisors (see below), whose sum is σ = 2110120. Its totient is φ = 2102760.

The previous prime is 2106437. The next prime is 2106451. The reversal of 2106439 is 9346012.

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

It is a cyclic number.

It is not a de Polignac number, because 2106439 - 2¹ = 2106437 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 (2106431) 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 in 3 ways as a sum of consecutive naturals, for example, 777 + ... + 2194.

It is an arithmetic number, because the mean of its divisors is an integer number (527530).

2^2106439 is an apocalyptic number.

2106439 is a deficient number, since it is larger than the sum of its proper divisors (3681).

2106439 is an equidigital number, since it uses as much as digits as its factorization.

2106439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 2106439 is about 1451.3576402803. The cubic root of 2106439 is about 128.1886662764.

It can be divided in two parts, 210 and 6439, that multiplied together give a triangular number (1352190 = T₁₆₄₄).

The spelling of 2106439 in words is "two million, one hundred six thousand, four hundred thirty-nine".