85142500 has 30 divisors (see below), whose sum is σ = 186195086. Its totient is φ = 34056000.

The previous prime is 85142489. The next prime is 85142501. The reversal of 85142500 is 524158.

It can be written as a sum of positive squares in 5 ways, for example, as 18164644 + 66977856 = 4262^2 + 8184^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (85142501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 14529 + ... + 19528.

Almost surely, 2^85142500 is an apocalyptic number.

It is an amenable number.

85142500 is an abundant number, since it is smaller than the sum of its proper divisors (101052586).

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

85142500 is a wasteful number, since it uses less digits than its factorization.

85142500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34081 (or 34064 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 85142500 is about 9227.2693685619. The cubic root of 85142500 is about 439.9285352253.

Adding to 85142500 its reverse (524158), we get a palindrome (85666658).

The spelling of 85142500 in words is "eighty-five million, one hundred forty-two thousand, five hundred".