2021975 has 12 divisors (see below), whose sum is σ = 2589120. Its totient is φ = 1564800.

The previous prime is 2021959. The next prime is 2022011. The reversal of 2021975 is 5791202.

It is not a de Polignac number, because 2021975 - 2⁴ = 2021959 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 530 + ... + 2079.

It is an arithmetic number, because the mean of its divisors is an integer number (215760).

2^2021975 is an apocalyptic number.

2021975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2021975 is a deficient number, since it is larger than the sum of its proper divisors (567145).

2021975 is a wasteful number, since it uses less digits than its factorization.

2021975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650 (or 2645 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 2021975 is about 1421.9616731825. The cubic root of 2021975 is about 126.4518712691.

It can be divided in two parts, 202197 and 5, that added together give a palindrome (202202).

The spelling of 2021975 in words is "two million, twenty-one thousand, nine hundred seventy-five".