1223156 has 12 divisors (see below), whose sum is σ = 2335200. Its totient is φ = 555960.

The previous prime is 1223149. The next prime is 1223161. The reversal of 1223156 is 6513221.

It is a super-2 number, since 2×1223156² = 2992221200672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13856 + ... + 13943.

It is an arithmetic number, because the mean of its divisors is an integer number (194600).

2^1223156 is an apocalyptic number.

It is an amenable number.

1223156 is a deficient number, since it is larger than the sum of its proper divisors (1112044).

1223156 is a wasteful number, since it uses less digits than its factorization.

1223156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27814 (or 27812 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 1223156 is about 1105.9638330434. The cubic root of 1223156 is about 106.9450324712.

Adding to 1223156 its reverse (6513221), we get a palindrome (7736377).

The spelling of 1223156 in words is "one million, two hundred twenty-three thousand, one hundred fifty-six".