1905985 has 8 divisors (see below), whose sum is σ = 2407680. Its totient is φ = 1444464.

The previous prime is 1905983. The next prime is 1906007. The reversal of 1905985 is 5895091.

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

It is a cyclic number.

It is not a de Polignac number, because 1905985 - 2¹ = 1905983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1905983) 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, 9937 + ... + 10126.

It is an arithmetic number, because the mean of its divisors is an integer number (300960).

2^1905985 is an apocalyptic number.

It is an amenable number.

1905985 is a deficient number, since it is larger than the sum of its proper divisors (501695).

1905985 is a wasteful number, since it uses less digits than its factorization.

1905985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20087.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 1905985 is about 1380.5741559221. The cubic root of 1905985 is about 123.9861456946.

The spelling of 1905985 in words is "one million, nine hundred five thousand, nine hundred eighty-five".