1856065 has 4 divisors (see below), whose sum is σ = 2227284. Its totient is φ = 1484848.

The previous prime is 1856059. The next prime is 1856069. The reversal of 1856065 is 5606581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 394384 + 1461681 = 628^2 + 1209^2 .

It is a cyclic number.

It is not a de Polignac number, because 1856065 - 2⁵ = 1856033 is a prime.

It is a Duffinian number.

1856065 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1856069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185602 + ... + 185611.

It is an arithmetic number, because the mean of its divisors is an integer number (556821).

2^1856065 is an apocalyptic number.

It is an amenable number.

1856065 is a deficient number, since it is larger than the sum of its proper divisors (371219).

1856065 is an equidigital number, since it uses as much as digits as its factorization.

1856065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371218.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1856065 is about 1362.3747648867. The cubic root of 1856065 is about 122.8941076414.

The spelling of 1856065 in words is "one million, eight hundred fifty-six thousand, sixty-five".