1243213326 has 32 divisors (see below), whose sum is σ = 2768061600. Its totient is φ = 413599680.

The previous prime is 1243213241. The next prime is 1243213327. The reversal of 1243213326 is 6233123421.

1243213326 is a `hidden beast` number, since 1 + 2 + 4 + 321 + 332 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1243213326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243213327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6040 + ... + 50228.

It is an arithmetic number, because the mean of its divisors is an integer number (86501925).

Almost surely, 2^1243213326 is an apocalyptic number.

1243213326 is an abundant number, since it is smaller than the sum of its proper divisors (1524848274).

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

1243213326 is a wasteful number, since it uses less digits than its factorization.

1243213326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44721 (or 44715 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 1243213326 is about 35259.2303659623. The cubic root of 1243213326 is about 1075.2642800029.

Adding to 1243213326 its reverse (6233123421), we get a palindrome (7476336747).

The spelling of 1243213326 in words is "one billion, two hundred forty-three million, two hundred thirteen thousand, three hundred twenty-six".