1321436064 has 96 divisors (see below), whose sum is σ = 3748852800. Its totient is φ = 405153792.

The previous prime is 1321436023. The next prime is 1321436071. The reversal of 1321436064 is 4606341231.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

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, 381412 + ... + 384860.

It is an arithmetic number, because the mean of its divisors is an integer number (39050550).

Almost surely, 2^1321436064 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 1321436064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1874426400).

1321436064 is an abundant number, since it is smaller than the sum of its proper divisors (2427416736).

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

1321436064 is a wasteful number, since it uses less digits than its factorization.

1321436064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782 (or 3774 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1321436064 is about 36351.5620572211. The cubic root of 1321436064 is about 1097.3589710217.

Adding to 1321436064 its reverse (4606341231), we get a palindrome (5927777295).

The spelling of 1321436064 in words is "one billion, three hundred twenty-one million, four hundred thirty-six thousand, sixty-four".