84021825 has 12 divisors (see below), whose sum is σ = 138916208. Its totient is φ = 44811600.

The previous prime is 84021823. The next prime is 84021859. The reversal of 84021825 is 52812048.

It is not a de Polignac number, because 84021825 - 2¹ = 84021823 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 84021792 and 84021801.

It is not an unprimeable number, because it can be changed into a prime (84021823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 560071 + ... + 560220.

Almost surely, 2^84021825 is an apocalyptic number.

It is an amenable number.

84021825 is a deficient number, since it is larger than the sum of its proper divisors (54894383).

84021825 is a wasteful number, since it uses less digits than its factorization.

84021825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120304 (or 1120299 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 84021825 is about 9166.3419639461. The cubic root of 84021825 is about 437.9898404683.

The spelling of 84021825 in words is "eighty-four million, twenty-one thousand, eight hundred twenty-five".