920221 has 4 divisors (see below), whose sum is σ = 931392. Its totient is φ = 909052.

The previous prime is 920219. The next prime is 920233. The reversal of 920221 is 122029.

It is a happy number.

920221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 920221 - 2¹ = 920219 is a prime.

It is a Duffinian number.

920221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 920195 and 920204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5461 + ... + 5626.

It is an arithmetic number, because the mean of its divisors is an integer number (232848).

2⁹²⁰²²¹ is an apocalyptic number.

It is an amenable number.

920221 is a deficient number, since it is larger than the sum of its proper divisors (11171).

920221 is a wasteful number, since it uses less digits than its factorization.

920221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11170.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 920221 is about 959.2815019586. The cubic root of 920221 is about 97.2666697567.

The spelling of 920221 in words is "nine hundred twenty thousand, two hundred twenty-one".