85425420 has 24 divisors (see below), whose sum is σ = 239191344. Its totient is φ = 22780096.

The previous prime is 85425413. The next prime is 85425421. The reversal of 85425420 is 2452458.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (85425421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711819 + ... + 711938.

It is an arithmetic number, because the mean of its divisors is an integer number (9966306).

Almost surely, 2^85425420 is an apocalyptic number.

It is an amenable number.

85425420 is an abundant number, since it is smaller than the sum of its proper divisors (153765924).

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

85425420 is a wasteful number, since it uses less digits than its factorization.

85425420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423769 (or 1423767 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 85425420 is about 9242.5873001016. The cubic root of 85425420 is about 440.4152759795.

Adding to 85425420 its reverse (2452458), we get a palindrome (87877878).

The spelling of 85425420 in words is "eighty-five million, four hundred twenty-five thousand, four hundred twenty".