1216236 has 24 divisors (see below), whose sum is σ = 3243520. Its totient is φ = 347472.

The previous prime is 1216213. The next prime is 1216249. The reversal of 1216236 is 6326121.

It is a happy number.

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 plaindrome in base 13.

It is a zygodrome in base 13.

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 7 ways as a sum of consecutive naturals, for example, 7156 + ... + 7323.

2^1216236 is an apocalyptic number.

It is an amenable number.

1216236 is an abundant number, since it is smaller than the sum of its proper divisors (2027284).

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

1216236 is a wasteful number, since it uses less digits than its factorization.

1216236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14493 (or 14491 counting only the distinct ones).

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

The square root of 1216236 is about 1102.8309027226. The cubic root of 1216236 is about 106.7429705767.

The spelling of 1216236 in words is "one million, two hundred sixteen thousand, two hundred thirty-six".