1045221 has 4 divisors (see below), whose sum is σ = 1393632. Its totient is φ = 696812.

The previous prime is 1045199. The next prime is 1045223. The reversal of 1045221 is 1225401.

1045221 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.

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 1045221 - 2⁶ = 1045157 is a prime.

It is a D-number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 1045221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045223) 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, 174201 + ... + 174206.

It is an arithmetic number, because the mean of its divisors is an integer number (348408).

2^1045221 is an apocalyptic number.

It is an amenable number.

1045221 is a deficient number, since it is larger than the sum of its proper divisors (348411).

1045221 is an equidigital number, since it uses as much as digits as its factorization.

1045221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348410.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1045221 is about 1022.3605039320. The cubic root of 1045221 is about 101.4851992946.

The spelling of 1045221 in words is "one million, forty-five thousand, two hundred twenty-one".