1213768 has 16 divisors (see below), whose sum is σ = 2291580. Its totient is φ = 602688.

The previous prime is 1213763. The next prime is 1213781. The reversal of 1213768 is 8673121.

It can be written as a sum of positive squares in 2 ways, for example, as 1004004 + 209764 = 1002^2 + 458^2 .

It is a super-3 number, since 3×1213768³ = 5364488333995562496, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 946 + ... + 1822.

2^1213768 is an apocalyptic number.

It is an amenable number.

1213768 is a deficient number, since it is larger than the sum of its proper divisors (1077812).

1213768 is a wasteful number, since it uses less digits than its factorization.

1213768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056 (or 1052 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 1213768 is about 1101.7113959654. The cubic root of 1213768 is about 106.6707203321.

Adding to 1213768 its reverse (8673121), we get a palindrome (9886889).

The spelling of 1213768 in words is "one million, two hundred thirteen thousand, seven hundred sixty-eight".