1223171 has 4 divisors (see below), whose sum is σ = 1237992. Its totient is φ = 1208352.

The previous prime is 1223161. The next prime is 1223177. The reversal of 1223171 is 1713221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223171 is a prime.

It is a super-2 number, since 2×1223171² = 2992294590482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223177) 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, 7286 + ... + 7451.

It is an arithmetic number, because the mean of its divisors is an integer number (309498).

2^1223171 is an apocalyptic number.

1223171 is a deficient number, since it is larger than the sum of its proper divisors (14821).

1223171 is an equidigital number, since it uses as much as digits as its factorization.

1223171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14820.

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

The square root of 1223171 is about 1105.9706144378. The cubic root of 1223171 is about 106.9454696378.

Adding to 1223171 its reverse (1713221), we get a palindrome (2936392).

The spelling of 1223171 in words is "one million, two hundred twenty-three thousand, one hundred seventy-one".