84125520 has 320 divisors, whose sum is σ = 321408000. Its totient is φ = 20127744.

The previous prime is 84125507. The next prime is 84125539. The reversal of 84125520 is 2552148.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1064841 + ... + 1064919.

It is an arithmetic number, because the mean of its divisors is an integer number (1004400).

Almost surely, 2^84125520 is an apocalyptic number.

84125520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84125520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160704000).

84125520 is an abundant number, since it is smaller than the sum of its proper divisors (237282480).

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

84125520 is a wasteful number, since it uses less digits than its factorization.

84125520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 84125520 is about 9171.9965111201. The cubic root of 84125520 is about 438.1699471864.

Adding to 84125520 its reverse (2552148), we get a palindrome (86677668).

The spelling of 84125520 in words is "eighty-four million, one hundred twenty-five thousand, five hundred twenty".