84381825 has 48 divisors (see below), whose sum is σ = 158846976. Its totient is φ = 39124800.

The previous prime is 84381821. The next prime is 84381833. The reversal of 84381825 is 52818348.

It is not a de Polignac number, because 84381825 - 2² = 84381821 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84381821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16752 + ... + 21198.

It is an arithmetic number, because the mean of its divisors is an integer number (3309312).

Almost surely, 2^84381825 is an apocalyptic number.

It is an amenable number.

84381825 is a deficient number, since it is larger than the sum of its proper divisors (74465151).

84381825 is a wasteful number, since it uses less digits than its factorization.

84381825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4494 (or 4489 counting only the distinct ones).

The product of its digits is 61440, while the sum is 39.

The square root of 84381825 is about 9185.9580338689. The cubic root of 84381825 is about 438.6144864404.

The spelling of 84381825 in words is "eighty-four million, three hundred eighty-one thousand, eight hundred twenty-five".