1213056 has 112 divisors (see below), whose sum is σ = 3902010. Its totient is φ = 373248.

The previous prime is 1213049. The next prime is 1213057. The reversal of 1213056 is 6503121.

It can be written as a sum of positive squares in only one way, i.e., 1166400 + 46656 = 1080^2 + 216^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (1213057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 93306 + ... + 93318.

2^1213056 is an apocalyptic number.

1213056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1951005).

1213056 is an abundant number, since it is smaller than the sum of its proper divisors (2688954).

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

1213056 is an frugal number, since it uses more digits than its factorization.

1213056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1213056 is about 1101.3882149360. The cubic root of 1213056 is about 106.6498584627.

Adding to 1213056 its reverse (6503121), we get a palindrome (7716177).

The spelling of 1213056 in words is "one million, two hundred thirteen thousand, fifty-six".