1213436 has 36 divisors (see below), whose sum is σ = 2547216. Its totient is φ = 504000.

The previous prime is 1213427. The next prime is 1213439. The reversal of 1213436 is 6343121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213439) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 7961 + ... + 8111.

It is an arithmetic number, because the mean of its divisors is an integer number (70756).

2^1213436 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 1213436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1273608).

1213436 is an abundant number, since it is smaller than the sum of its proper divisors (1333780).

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

1213436 is a wasteful number, since it uses less digits than its factorization.

1213436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 201 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 1213436 is about 1101.5607109915. The cubic root of 1213436 is about 106.6609936219.

Adding to 1213436 its reverse (6343121), we get a palindrome (7556557).

The spelling of 1213436 in words is "one million, two hundred thirteen thousand, four hundred thirty-six".