1321146564 has 12 divisors (see below), whose sum is σ = 3082675344. Its totient is φ = 440382184.

The previous prime is 1321146539. The next prime is 1321146569. The reversal of 1321146564 is 4656411231.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1321146569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55047762 + ... + 55047785.

It is an arithmetic number, because the mean of its divisors is an integer number (256889612).

Almost surely, 2^1321146564 is an apocalyptic number.

It is an amenable number.

1321146564 is an abundant number, since it is smaller than the sum of its proper divisors (1761528780).

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

1321146564 is a wasteful number, since it uses less digits than its factorization.

1321146564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110095554 (or 110095552 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 1321146564 is about 36347.5798919268. The cubic root of 1321146564 is about 1097.2788287601.

Adding to 1321146564 its reverse (4656411231), we get a palindrome (5977557795).

The spelling of 1321146564 in words is "one billion, three hundred twenty-one million, one hundred forty-six thousand, five hundred sixty-four".