85421120 has 112 divisors (see below), whose sum is σ = 214579200. Its totient is φ = 32348160.

The previous prime is 85421117. The next prime is 85421159. The reversal of 85421120 is 2112458.

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 15 ways as a sum of consecutive naturals, for example, 783626 + ... + 783734.

Almost surely, 2^85421120 is an apocalyptic number.

85421120 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 85421120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107289600).

85421120 is an abundant number, since it is smaller than the sum of its proper divisors (129158080).

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

85421120 is a wasteful number, since it uses less digits than its factorization.

85421120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 85421120 is about 9242.3546783274. The cubic root of 85421120 is about 440.4078862297.

Adding to 85421120 its reverse (2112458), we get a palindrome (87533578).

The spelling of 85421120 in words is "eighty-five million, four hundred twenty-one thousand, one hundred twenty".