1445221 has 8 divisors (see below), whose sum is σ = 1543104. Its totient is φ = 1348800.

The previous prime is 1445207. The next prime is 1445237. The reversal of 1445221 is 1225441.

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 1445221 - 2¹⁷ = 1314149 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 (1445261) 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, 2286 + ... + 2848.

It is an arithmetic number, because the mean of its divisors is an integer number (192888).

2^1445221 is an apocalyptic number.

It is an amenable number.

1445221 is a deficient number, since it is larger than the sum of its proper divisors (97883).

1445221 is a wasteful number, since it uses less digits than its factorization.

1445221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731.

The product of its digits is 320, while the sum is 19.

The square root of 1445221 is about 1202.1734483842. The cubic root of 1445221 is about 113.0606352207.

The spelling of 1445221 in words is "one million, four hundred forty-five thousand, two hundred twenty-one".