985521 has 8 divisors (see below), whose sum is σ = 1356544. Its totient is φ = 635760.

The previous prime is 985519. The next prime is 985529. The reversal of 985521 is 125589.

985521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 985521 - 2¹ = 985519 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 985521.

It is not an unprimeable number, because it can be changed into a prime (985529) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5206 + ... + 5391.

It is an arithmetic number, because the mean of its divisors is an integer number (169568).

2⁹⁸⁵⁵²¹ is an apocalyptic number.

It is an amenable number.

985521 is a deficient number, since it is larger than the sum of its proper divisors (371023).

985521 is a wasteful number, since it uses less digits than its factorization.

985521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10631.

The product of its digits is 3600, while the sum is 30.

The square root of 985521 is about 992.7341033731. The cubic root of 985521 is about 99.5150183975.

Adding to 985521 its product of digits (3600), we get a triangular number (989121 = T₁₄₀₆).

The spelling of 985521 in words is "nine hundred eighty-five thousand, five hundred twenty-one".