2605831 has 16 divisors (see below), whose sum is σ = 2937600. Its totient is φ = 2299968.

The previous prime is 2605819. The next prime is 2605847. The reversal of 2605831 is 1385062.

It is a happy number.

2605831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2605831 - 2⁹ = 2605319 is a prime.

It is a super-2 number, since 2×2605831² = 13580710401122, which contains 22 as substring.

It is a Duffinian number.

2605831 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2605796 and 2605805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29235 + ... + 29323.

It is an arithmetic number, because the mean of its divisors is an integer number (183600).

2^2605831 is an apocalyptic number.

2605831 is a deficient number, since it is larger than the sum of its proper divisors (331769).

2605831 is a wasteful number, since it uses less digits than its factorization.

2605831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2605831 is about 1614.2586533762. The cubic root of 2605831 is about 137.6096051694.

The spelling of 2605831 in words is "two million, six hundred five thousand, eight hundred thirty-one".