985621 has 8 divisors (see below), whose sum is σ = 1213184. Its totient is φ = 779760.

The previous prime is 985613. The next prime is 985631. The reversal of 985621 is 126589.

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

It is a cyclic number.

It is not a de Polignac number, because 985621 - 2³ = 985613 is a prime.

985621 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985601) 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, 5325 + ... + 5506.

It is an arithmetic number, because the mean of its divisors is an integer number (151648).

2⁹⁸⁵⁶²¹ is an apocalyptic number.

985621 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

985621 is a deficient number, since it is larger than the sum of its proper divisors (227563).

985621 is a wasteful number, since it uses less digits than its factorization.

985621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10851.

The product of its digits is 4320, while the sum is 31.

The square root of 985621 is about 992.7844680493. The cubic root of 985621 is about 99.5183841858.

The spelling of 985621 in words is "nine hundred eighty-five thousand, six hundred twenty-one".