1855841 has 4 divisors (see below), whose sum is σ = 1998612. Its totient is φ = 1713072.

The previous prime is 1855823. The next prime is 1855849. The reversal of 1855841 is 1485581.

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 355216 + 1500625 = 596^2 + 1225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1855841 - 2¹⁴ = 1839457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1855798 and 1855807.

It is not an unprimeable number, because it can be changed into a prime (1855849) 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, 71366 + ... + 71391.

It is an arithmetic number, because the mean of its divisors is an integer number (499653).

2^1855841 is an apocalyptic number.

It is an amenable number.

1855841 is a deficient number, since it is larger than the sum of its proper divisors (142771).

1855841 is a wasteful number, since it uses less digits than its factorization.

1855841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142770.

The product of its digits is 6400, while the sum is 32.

The square root of 1855841 is about 1362.2925530150. The cubic root of 1855841 is about 122.8891635998.

The spelling of 1855841 in words is "one million, eight hundred fifty-five thousand, eight hundred forty-one".