2021825 has 12 divisors (see below), whose sum is σ = 2700348. Its totient is φ = 1492800.

The previous prime is 2021807. The next prime is 2021837. The reversal of 2021825 is 5281202.

It can be written as a sum of positive squares in 6 ways, for example, as 703921 + 1317904 = 839^2 + 1148^2 .

It is not a de Polignac number, because 2021825 - 2¹⁴ = 2005441 is a prime.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021797 and 2021806.

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, 2786 + ... + 3435.

It is an arithmetic number, because the mean of its divisors is an integer number (225029).

2^2021825 is an apocalyptic number.

2021825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2021825 is a deficient number, since it is larger than the sum of its proper divisors (678523).

2021825 is a wasteful number, since it uses less digits than its factorization.

2021825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6244 (or 6239 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2021825 is about 1421.9089281666. The cubic root of 2021825 is about 126.4487442522.

The spelling of 2021825 in words is "two million, twenty-one thousand, eight hundred twenty-five".