2605939 has 4 divisors (see below), whose sum is σ = 2978224. Its totient is φ = 2233656.

The previous prime is 2605931. The next prime is 2605943. The reversal of 2605939 is 9395062.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9395062 = 2 ⋅4697531.

It is a cyclic number.

It is not a de Polignac number, because 2605939 - 2³ = 2605931 is a prime.

It is a Duffinian number.

2605939 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2605931) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 186132 + ... + 186145.

It is an arithmetic number, because the mean of its divisors is an integer number (744556).

2^2605939 is an apocalyptic number.

2605939 is a deficient number, since it is larger than the sum of its proper divisors (372285).

2605939 is an equidigital number, since it uses as much as digits as its factorization.

2605939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372284.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 2605939 is about 1614.2921049178. The cubic root of 2605939 is about 137.6115062433.

The spelling of 2605939 in words is "two million, six hundred five thousand, nine hundred thirty-nine".