1223136 has 72 divisors (see below), whose sum is σ = 3616704. Its totient is φ = 391680.

The previous prime is 1223119. The next prime is 1223149. The reversal of 1223136 is 6313221.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8860 + ... + 8996.

It is an arithmetic number, because the mean of its divisors is an integer number (50232).

2^1223136 is an apocalyptic number.

1223136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1808352).

1223136 is an abundant number, since it is smaller than the sum of its proper divisors (2393568).

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

1223136 is a wasteful number, since it uses less digits than its factorization.

1223136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 173 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 1223136 is about 1105.9547911194. The cubic root of 1223136 is about 106.9444495768.

Adding to 1223136 its reverse (6313221), we get a palindrome (7536357).

The spelling of 1223136 in words is "one million, two hundred twenty-three thousand, one hundred thirty-six".