1075221 has 16 divisors (see below), whose sum is σ = 1820800. Its totient is φ = 614304.

The previous prime is 1075201. The next prime is 1075231. The reversal of 1075221 is 1225701.

It is not a de Polignac number, because 1075221 - 2⁷ = 1075093 is a prime.

It is a super-2 number, since 2×1075221² = 2312200397682, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

1075221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1075194 and 1075203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1075201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2656 + ... + 3033.

It is an arithmetic number, because the mean of its divisors is an integer number (113800).

2^1075221 is an apocalyptic number.

It is an amenable number.

1075221 is a deficient number, since it is larger than the sum of its proper divisors (745579).

1075221 is an equidigital number, since it uses as much as digits as its factorization.

1075221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5705 (or 5699 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 1075221 is about 1036.9286378532. The cubic root of 1075221 is about 102.4470001630.

It can be divided in two parts, 1075 and 221, that added together give a 4-th power (1296 = 6⁴).

The spelling of 1075221 in words is "one million, seventy-five thousand, two hundred twenty-one".