2146705 has 16 divisors (see below), whose sum is σ = 2934144. Its totient is φ = 1492480.

The previous prime is 2146693. The next prime is 2146723. The reversal of 2146705 is 5076412.

It is not a de Polignac number, because 2146705 - 2⁵ = 2146673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2146705.

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 15 ways as a sum of consecutive naturals, for example, 417 + ... + 2113.

It is an arithmetic number, because the mean of its divisors is an integer number (183384).

2^2146705 is an apocalyptic number.

It is an amenable number.

2146705 is a deficient number, since it is larger than the sum of its proper divisors (787439).

2146705 is a wasteful number, since it uses less digits than its factorization.

2146705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 2146705 is about 1465.1638133670. The cubic root of 2146705 is about 129.0003204928. Note that the first 3 decimals are identical.

It can be divided in two parts, 2146 and 705, that multiplied together give a triangular number (1512930 = T₁₇₃₉).

The spelling of 2146705 in words is "two million, one hundred forty-six thousand, seven hundred five".