1221336 has 24 divisors (see below), whose sum is σ = 3307980. Its totient is φ = 407088.

The previous prime is 1221299. The next prime is 1221373. The reversal of 1221336 is 6331221.

It is an interprime number because it is at equal distance from previous prime (1221299) and next prime (1221373).

It is a tau number, because it is divible by the number of its divisors (24).

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 5 ways as a sum of consecutive naturals, for example, 8410 + ... + 8553.

2^1221336 is an apocalyptic number.

It is an amenable number.

1221336 is an abundant number, since it is smaller than the sum of its proper divisors (2086644).

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

1221336 is a wasteful number, since it uses less digits than its factorization.

1221336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16975 (or 16968 counting only the distinct ones).

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

The square root of 1221336 is about 1105.1407150223. The cubic root of 1221336 is about 106.8919630406.

Adding to 1221336 its reverse (6331221), we get a palindrome (7552557).

The spelling of 1221336 in words is "one million, two hundred twenty-one thousand, three hundred thirty-six".