985852521 has 12 divisors (see below), whose sum is σ = 1425681972. Its totient is φ = 656462976.

The previous prime is 985852501. The next prime is 985852541. The reversal of 985852521 is 125258589.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (985852501) and next prime (985852541).

It can be written as a sum of positive squares in 2 ways, for example, as 559842921 + 426009600 = 23661^2 + 20640^2 .

It is not a de Polignac number, because 985852521 - 2⁹ = 985852009 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (985852501) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56196 + ... + 71621.

It is an arithmetic number, because the mean of its divisors is an integer number (118806831).

Almost surely, 2^985852521 is an apocalyptic number.

It is an amenable number.

985852521 is a deficient number, since it is larger than the sum of its proper divisors (439829451).

985852521 is a wasteful number, since it uses less digits than its factorization.

985852521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128680 (or 128677 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The square root of 985852521 is about 31398.2885043118. The cubic root of 985852521 is about 995.2617581905.

The spelling of 985852521 in words is "nine hundred eighty-five million, eight hundred fifty-two thousand, five hundred twenty-one".