2705865 has 8 divisors (see below), whose sum is σ = 4329408. Its totient is φ = 1443120.

The previous prime is 2705863. The next prime is 2705869. The reversal of 2705865 is 5685072.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2705865 - 2¹ = 2705863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2705863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90181 + ... + 90210.

It is an arithmetic number, because the mean of its divisors is an integer number (541176).

2^2705865 is an apocalyptic number.

It is an amenable number.

2705865 is a deficient number, since it is larger than the sum of its proper divisors (1623543).

2705865 is a wasteful number, since it uses less digits than its factorization.

2705865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180399.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 2705865 is about 1644.9513670623. The cubic root of 2705865 is about 139.3484177152.

It can be divided in two parts, 2705 and 865, that added together give a triangular number (3570 = T₈₄).

The spelling of 2705865 in words is "two million, seven hundred five thousand, eight hundred sixty-five".