1213356 has 12 divisors (see below), whose sum is σ = 2831192. Its totient is φ = 404448.

The previous prime is 1213339. The next prime is 1213357. The reversal of 1213356 is 6533121.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1213357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50545 + ... + 50568.

2^1213356 is an apocalyptic number.

It is an amenable number.

1213356 is an abundant number, since it is smaller than the sum of its proper divisors (1617836).

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

1213356 is a wasteful number, since it uses less digits than its factorization.

1213356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101120 (or 101118 counting only the distinct ones).

The product of its digits is 540, while the sum is 21.

The square root of 1213356 is about 1101.5243982772. The cubic root of 1213356 is about 106.6586495711.

Adding to 1213356 its reverse (6533121), we get a palindrome (7746477).

The spelling of 1213356 in words is "one million, two hundred thirteen thousand, three hundred fifty-six".