945221 has 4 divisors (see below), whose sum is σ = 975744. Its totient is φ = 914700.

The previous prime is 945211. The next prime is 945227. The reversal of 945221 is 122549.

945221 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 a de Polignac number, because none of the positive numbers 2^k-945221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945227) 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, 15215 + ... + 15276.

It is an arithmetic number, because the mean of its divisors is an integer number (243936).

2⁹⁴⁵²²¹ is an apocalyptic number.

It is an amenable number.

945221 is a deficient number, since it is larger than the sum of its proper divisors (30523).

945221 is a wasteful number, since it uses less digits than its factorization.

945221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30522.

The product of its digits is 720, while the sum is 23.

The square root of 945221 is about 972.2247682506. The cubic root of 945221 is about 98.1396385047.

The spelling of 945221 in words is "nine hundred forty-five thousand, two hundred twenty-one".