994221 has 16 divisors (see below), whose sum is σ = 1537920. Its totient is φ = 633600.

The previous prime is 994199. The next prime is 994229. The reversal of 994221 is 122499.

It is not a de Polignac number, because 994221 - 2⁷ = 994093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994229) 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 15 ways as a sum of consecutive naturals, for example, 180 + ... + 1421.

It is an arithmetic number, because the mean of its divisors is an integer number (96120).

2⁹⁹⁴²²¹ is an apocalyptic number.

It is an amenable number.

994221 is a deficient number, since it is larger than the sum of its proper divisors (543699).

994221 is a wasteful number, since it uses less digits than its factorization.

994221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633 (or 1627 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 994221 is about 997.1063132886. The cubic root of 994221 is about 99.8069943947.

The spelling of 994221 in words is "nine hundred ninety-four thousand, two hundred twenty-one".