1173221 has 8 divisors (see below), whose sum is σ = 1419840. Its totient is φ = 946368.

The previous prime is 1173199. The next prime is 1173223. The reversal of 1173221 is 1223711.

1173221 = 169² + 170² + ... + 202².

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 1173221 - 2⁶ = 1173157 is a prime.

It is a super-4 number, since 4×1173221⁴ (a number of 25 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 1173221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1173223) 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, 4811 + ... + 5048.

It is an arithmetic number, because the mean of its divisors is an integer number (177480).

2^1173221 is an apocalyptic number.

It is an amenable number.

1173221 is a deficient number, since it is larger than the sum of its proper divisors (246619).

1173221 is an equidigital number, since it uses as much as digits as its factorization.

1173221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9883.

The product of its digits is 84, while the sum is 17.

The square root of 1173221 is about 1083.1532670864. The cubic root of 1173221 is about 105.4694325315.

Adding to 1173221 its reverse (1223711), we get a palindrome (2396932).

The spelling of 1173221 in words is "one million, one hundred seventy-three thousand, two hundred twenty-one".