1994905 has 32 divisors (see below), whose sum is σ = 2903040. Its totient is φ = 1298880.

The previous prime is 1994897. The next prime is 1994911. The reversal of 1994905 is 5094991.

It is not a de Polignac number, because 1994905 - 2³ = 1994897 is a prime.

1994905 is a lucky 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 31 ways as a sum of consecutive naturals, for example, 23994 + ... + 24076.

It is an arithmetic number, because the mean of its divisors is an integer number (90720).

2^1994905 is an apocalyptic number.

It is an amenable number.

1994905 is a deficient number, since it is larger than the sum of its proper divisors (908135).

1994905 is a wasteful number, since it uses less digits than its factorization.

1994905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 1994905 is about 1412.4110591467. The cubic root of 1994905 is about 125.8850257140.

The spelling of 1994905 in words is "one million, nine hundred ninety-four thousand, nine hundred five".