2021985 has 48 divisors (see below), whose sum is σ = 4118400. Its totient is φ = 917280.

The previous prime is 2021959. The next prime is 2022011. The reversal of 2021985 is 5891202.

It is an interprime number because it is at equal distance from previous prime (2021959) and next prime (2022011).

It is not a de Polignac number, because 2021985 - 2⁸ = 2021729 is a prime.

2021985 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15370 + ... + 15500.

It is an arithmetic number, because the mean of its divisors is an integer number (85800).

2^2021985 is an apocalyptic number.

It is an amenable number.

2021985 is an abundant number, since it is smaller than the sum of its proper divisors (2096415).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021985 is a wasteful number, since it uses less digits than its factorization.

2021985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 2021985 is about 1421.9651894473. The cubic root of 2021985 is about 126.4520797314.

It can be divided in two parts, 202 and 1985, that added together give a 7-th power (2187 = 3⁷).

The spelling of 2021985 in words is "two million, twenty-one thousand, nine hundred eighty-five".