2785139 has 8 divisors (see below), whose sum is σ = 3321600. Its totient is φ = 2283336.

The previous prime is 2785129. The next prime is 2785157. The reversal of 2785139 is 9315872.

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

It is a cyclic number.

It is not a de Polignac number, because 2785139 - 2⁸ = 2784883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2785099 and 2785108.

It is not an unprimeable number, because it can be changed into a prime (2785129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8489 + ... + 8810.

It is an arithmetic number, because the mean of its divisors is an integer number (415200).

2^2785139 is an apocalyptic number.

2785139 is a deficient number, since it is larger than the sum of its proper divisors (536461).

2785139 is a wasteful number, since it uses less digits than its factorization.

2785139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17329.

The product of its digits is 15120, while the sum is 35.

The square root of 2785139 is about 1668.8735722037. The cubic root of 2785139 is about 140.6961752618.

The spelling of 2785139 in words is "two million, seven hundred eighty-five thousand, one hundred thirty-nine".