1321504464 has 80 divisors (see below), whose sum is σ = 3916356480. Its totient is φ = 376143360.

The previous prime is 1321504447. The next prime is 1321504477. The reversal of 1321504464 is 4644051231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83074 + ... + 97694.

It is an arithmetic number, because the mean of its divisors is an integer number (48954456).

Almost surely, 2^1321504464 is an apocalyptic number.

1321504464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321504464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1958178240).

1321504464 is an abundant number, since it is smaller than the sum of its proper divisors (2594852016).

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

1321504464 is a wasteful number, since it uses less digits than its factorization.

1321504464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14908 (or 14902 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1321504464 is about 36352.5028574375. The cubic root of 1321504464 is about 1097.3779044787.

Adding to 1321504464 its reverse (4644051231), we get a palindrome (5965555695).

The spelling of 1321504464 in words is "one billion, three hundred twenty-one million, five hundred four thousand, four hundred sixty-four".