1056221 has 4 divisors (see below), whose sum is σ = 1059744. Its totient is φ = 1052700.

The previous prime is 1056217. The next prime is 1056241. The reversal of 1056221 is 1226501.

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 1056221 - 2² = 1056217 is a prime.

It is a super-2 number, since 2×1056221² = 2231205601682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1056221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1265 + ... + 1926.

It is an arithmetic number, because the mean of its divisors is an integer number (264936).

2^1056221 is an apocalyptic number.

It is an amenable number.

1056221 is a deficient number, since it is larger than the sum of its proper divisors (3523).

1056221 is an equidigital number, since it uses as much as digits as its factorization.

1056221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1056221 is about 1027.7261308345. The cubic root of 1056221 is about 101.8399707688.

The spelling of 1056221 in words is "one million, fifty-six thousand, two hundred twenty-one".