1840985 has 4 divisors (see below), whose sum is σ = 2209188. Its totient is φ = 1472784.

The previous prime is 1840973. The next prime is 1841003. The reversal of 1840985 is 5890481.

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 1394761 + 446224 = 1181^2 + 668^2 .

It is a cyclic number.

It is not a de Polignac number, because 1840985 - 2⁶ = 1840921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 184094 + ... + 184103.

It is an arithmetic number, because the mean of its divisors is an integer number (552297).

2^1840985 is an apocalyptic number.

It is an amenable number.

1840985 is a deficient number, since it is larger than the sum of its proper divisors (368203).

1840985 is an equidigital number, since it uses as much as digits as its factorization.

1840985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368202.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 1840985 is about 1356.8290238641. The cubic root of 1840985 is about 122.5603756249.

The spelling of 1840985 in words is "one million, eight hundred forty thousand, nine hundred eighty-five".