1213328 has 10 divisors (see below), whose sum is σ = 2350854. Its totient is φ = 606656.

The previous prime is 1213327. The next prime is 1213339. The reversal of 1213328 is 8233121.

It can be written as a sum of positive squares in only one way, i.e., 1183744 + 29584 = 1088^2 + 172^2 .

It is not an unprimeable number, because it can be changed into a prime (1213327) 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 as a sum of consecutive naturals, namely, 37901 + ... + 37932.

2^1213328 is an apocalyptic number.

It is an amenable number.

1213328 is a deficient number, since it is larger than the sum of its proper divisors (1137526).

1213328 is an equidigital number, since it uses as much as digits as its factorization.

1213328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75841 (or 75835 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 1213328 is about 1101.5116885444. The cubic root of 1213328 is about 106.6578291289.

Adding to 1213328 its reverse (8233121), we get a palindrome (9446449).

The spelling of 1213328 in words is "one million, two hundred thirteen thousand, three hundred twenty-eight".