85021000 has 32 divisors (see below), whose sum is σ = 198951480. Its totient is φ = 34008000.

The previous prime is 85020977. The next prime is 85021033. The reversal of 85021000 is 12058.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19766916 + 65254084 = 4446^2 + 8078^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41511 + ... + 43510.

Almost surely, 2^85021000 is an apocalyptic number.

It is an amenable number.

85021000 is an abundant number, since it is smaller than the sum of its proper divisors (113930480).

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

85021000 is a wasteful number, since it uses less digits than its factorization.

85021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85042 (or 85028 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 85021000 is about 9220.6832718622. The cubic root of 85021000 is about 439.7191734198.

Adding to 85021000 its reverse (12058), we get a palindrome (85033058).

The spelling of 85021000 in words is "eighty-five million, twenty-one thousand".