2078605 has 4 divisors (see below), whose sum is σ = 2494332. Its totient is φ = 1662880.

The previous prime is 2078603. The next prime is 2078611. The reversal of 2078605 is 5068702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5068702 = 2 ⋅2534351.

It can be written as a sum of positive squares in 2 ways, for example, as 264196 + 1814409 = 514^2 + 1347^2 .

It is not a de Polignac number, because 2078605 - 2¹ = 2078603 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 (2078603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207856 + ... + 207865.

It is an arithmetic number, because the mean of its divisors is an integer number (623583).

2^2078605 is an apocalyptic number.

It is an amenable number.

2078605 is a deficient number, since it is larger than the sum of its proper divisors (415727).

2078605 is an equidigital number, since it uses as much as digits as its factorization.

2078605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415726.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 2078605 is about 1441.7367998355. The cubic root of 2078605 is about 127.6215424365.

The spelling of 2078605 in words is "two million, seventy-eight thousand, six hundred five".