1222536 has 64 divisors (see below), whose sum is σ = 3686400. Its totient is φ = 330048.

The previous prime is 1222523. The next prime is 1222537. The reversal of 1222536 is 6352221.

1222536 = T₄₃ + T₄₄ + ... + T₁₉₄.

1222536 is nontrivially palindromic in base 11.

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

It is not an unprimeable number, because it can be changed into a prime (1222537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3001 + ... + 3383.

It is an arithmetic number, because the mean of its divisors is an integer number (57600).

2^1222536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1843200).

1222536 is an abundant number, since it is smaller than the sum of its proper divisors (2463864).

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

1222536 is a wasteful number, since it uses less digits than its factorization.

1222536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 414 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 1222536 is about 1105.6834990177. The cubic root of 1222536 is about 106.9269597897.

Adding to 1222536 its reverse (6352221), we get a palindrome (7574757).

The spelling of 1222536 in words is "one million, two hundred twenty-two thousand, five hundred thirty-six".