2145785 has 16 divisors (see below), whose sum is σ = 2750976. Its totient is φ = 1603008.

The previous prime is 2145779. The next prime is 2145821. The reversal of 2145785 is 5875412.

It is not a de Polignac number, because 2145785 - 2⁴ = 2145769 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5207 + ... + 5603.

It is an arithmetic number, because the mean of its divisors is an integer number (171936).

2^2145785 is an apocalyptic number.

It is an amenable number.

2145785 is a deficient number, since it is larger than the sum of its proper divisors (605191).

2145785 is a wasteful number, since it uses less digits than its factorization.

2145785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472.

The product of its digits is 11200, while the sum is 32.

The square root of 2145785 is about 1464.8498216541. The cubic root of 2145785 is about 128.9818895714.

The spelling of 2145785 in words is "two million, one hundred forty-five thousand, seven hundred eighty-five".