1170221 has 4 divisors (see below), whose sum is σ = 1260252. Its totient is φ = 1080192.

The previous prime is 1170209. The next prime is 1170233. The reversal of 1170221 is 1220711.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1170209) and next prime (1170233).

It can be written as a sum of positive squares in 2 ways, for example, as 624100 + 546121 = 790^2 + 739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1170221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1170196 and 1170205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1170251) 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, 44996 + ... + 45021.

It is an arithmetic number, because the mean of its divisors is an integer number (315063).

2^1170221 is an apocalyptic number.

It is an amenable number.

1170221 is a deficient number, since it is larger than the sum of its proper divisors (90031).

1170221 is an equidigital number, since it uses as much as digits as its factorization.

1170221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90030.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 1170221 is about 1081.7675351017. The cubic root of 1170221 is about 105.3794584705.

Adding to 1170221 its reverse (1220711), we get a palindrome (2390932).

The spelling of 1170221 in words is "one million, one hundred seventy thousand, two hundred twenty-one".