1213320504 has 64 divisors (see below), whose sum is σ = 3315997440. Its totient is φ = 366901760.

The previous prime is 1213320469. The next prime is 1213320509. The reversal of 1213320504 is 4050233121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213320509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128224 + ... + 137360.

It is an arithmetic number, because the mean of its divisors is an integer number (51812460).

Almost surely, 2^1213320504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213320504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1657998720).

1213320504 is an abundant number, since it is smaller than the sum of its proper divisors (2102676936).

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

1213320504 is a wasteful number, since it uses less digits than its factorization.

1213320504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9660 (or 9656 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1213320504 is about 34832.7504512635. The cubic root of 1213320504 is about 1066.5760948270.

Adding to 1213320504 its reverse (4050233121), we get a palindrome (5263553625).

The spelling of 1213320504 in words is "one billion, two hundred thirteen million, three hundred twenty thousand, five hundred four".