2051985 has 32 divisors (see below), whose sum is σ = 3749760. Its totient is φ = 949248.

The previous prime is 2051969. The next prime is 2051999. The reversal of 2051985 is 5891502.

It is not a de Polignac number, because 2051985 - 2⁴ = 2051969 is a prime.

2051985 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3006 + ... + 3624.

It is an arithmetic number, because the mean of its divisors is an integer number (117180).

2^2051985 is an apocalyptic number.

It is an amenable number.

2051985 is a deficient number, since it is larger than the sum of its proper divisors (1697775).

2051985 is a wasteful number, since it uses less digits than its factorization.

2051985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 2051985 is about 1432.4751306742. The cubic root of 2051985 is about 127.0743978907.

The spelling of 2051985 in words is "two million, fifty-one thousand, nine hundred eighty-five".