3115861 has 6 divisors (see below), whose sum is σ = 3624630. Its totient is φ = 2670696.

The previous prime is 3115831. The next prime is 3115873. The reversal of 3115861 is 1685113.

It can be written as a sum of positive squares in only one way, i.e., 3062500 + 53361 = 1750^2 + 231^2 .

It is not a de Polignac number, because 3115861 - 2²¹ = 1018709 is a prime.

It is a Duffinian number.

3115861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3115831) 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 5 ways as a sum of consecutive naturals, for example, 31746 + ... + 31843.

It is an arithmetic number, because the mean of its divisors is an integer number (604105).

Almost surely, 2^3115861 is an apocalyptic number.

It is an amenable number.

3115861 is a deficient number, since it is larger than the sum of its proper divisors (508769).

3115861 is an equidigital number, since it uses as much as digits as its factorization.

3115861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63603 (or 63596 counting only the distinct ones).

The product of its digits is 720, while the sum is 25.

The square root of 3115861 is about 1765.1801607768. The cubic root of 3115861 is about 146.0582272284.

The spelling of 3115861 in words is "three million, one hundred fifteen thousand, eight hundred sixty-one".