2345861 has 4 divisors (see below), whose sum is σ = 2680992. Its totient is φ = 2010732.

The previous prime is 2345843. The next prime is 2345867. The reversal of 2345861 is 1685432.

2345861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2345861 - 2¹⁸ = 2083717 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 (2345867) 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 3 ways as a sum of consecutive naturals, for example, 167555 + ... + 167568.

It is an arithmetic number, because the mean of its divisors is an integer number (670248).

2^2345861 is an apocalyptic number.

It is an amenable number.

2345861 is a deficient number, since it is larger than the sum of its proper divisors (335131).

2345861 is an equidigital number, since it uses as much as digits as its factorization.

2345861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335130.

The product of its digits is 5760, while the sum is 29.

The square root of 2345861 is about 1531.6203837766. The cubic root of 2345861 is about 132.8721895758.

It can be divided in two parts, 2345 and 861, that multiplied together give a triangular number (2019045 = T₂₀₀₉).

The spelling of 2345861 in words is "two million, three hundred forty-five thousand, eight hundred sixty-one".