1217300256 has 72 divisors (see below), whose sum is σ = 3505582080. Its totient is φ = 400622976.

The previous prime is 1217300251. The next prime is 1217300257. The reversal of 1217300256 is 6520037121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (1217300251) 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, 4000 + ... + 49503.

It is an arithmetic number, because the mean of its divisors is an integer number (48688640).

Almost surely, 2^1217300256 is an apocalyptic number.

1217300256 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 1217300256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1752791040).

1217300256 is an abundant number, since it is smaller than the sum of its proper divisors (2288281824).

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

1217300256 is a wasteful number, since it uses less digits than its factorization.

1217300256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53598 (or 53587 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1217300256 is about 34889.8302661392. The cubic root of 1217300256 is about 1067.7409631420.

Adding to 1217300256 its reverse (6520037121), we get a palindrome (7737337377).

The spelling of 1217300256 in words is "one billion, two hundred seventeen million, three hundred thousand, two hundred fifty-six".