1223166 has 16 divisors (see below), whose sum is σ = 2795904. Its totient is φ = 349464.

The previous prime is 1223161. The next prime is 1223177. The reversal of 1223166 is 6613221.

It is a happy number.

It is a super-2 number, since 2×1223166² = 2992270127112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14520 + ... + 14603.

It is an arithmetic number, because the mean of its divisors is an integer number (174744).

2^1223166 is an apocalyptic number.

1223166 is an abundant number, since it is smaller than the sum of its proper divisors (1572738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223166 is a wasteful number, since it uses less digits than its factorization.

1223166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29135.

The product of its digits is 432, while the sum is 21.

The square root of 1223166 is about 1105.9683539776. The cubic root of 1223166 is about 106.9453239160.

Adding to 1223166 its reverse (6613221), we get a palindrome (7836387).

The spelling of 1223166 in words is "one million, two hundred twenty-three thousand, one hundred sixty-six".