2138785 has 16 divisors (see below), whose sum is σ = 2878272. Its totient is φ = 1512000.

The previous prime is 2138749. The next prime is 2138789. The reversal of 2138785 is 5878312.

It is not a de Polignac number, because 2138785 - 2⁷ = 2138657 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 2138785.

It is not an unprimeable number, because it can be changed into a prime (2138789) 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 15 ways as a sum of consecutive naturals, for example, 1510 + ... + 2560.

It is an arithmetic number, because the mean of its divisors is an integer number (179892).

2^2138785 is an apocalyptic number.

It is an amenable number.

2138785 is a deficient number, since it is larger than the sum of its proper divisors (739487).

2138785 is a wasteful number, since it uses less digits than its factorization.

2138785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104.

The product of its digits is 13440, while the sum is 34.

The square root of 2138785 is about 1462.4585464211. The cubic root of 2138785 is about 128.8414814694.

It can be divided in two parts, 213 and 8785, that added together give a palindrome (8998).

The spelling of 2138785 in words is "two million, one hundred thirty-eight thousand, seven hundred eighty-five".