1321433564 has 12 divisors (see below), whose sum is σ = 2522736888. Its totient is φ = 600651600.

The previous prime is 1321433557. The next prime is 1321433569. The reversal of 1321433564 is 4653341231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321433564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321433569) 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, 15016247 + ... + 15016334.

It is an arithmetic number, because the mean of its divisors is an integer number (210228074).

Almost surely, 2^1321433564 is an apocalyptic number.

It is an amenable number.

1321433564 is a deficient number, since it is larger than the sum of its proper divisors (1201303324).

1321433564 is a wasteful number, since it uses less digits than its factorization.

1321433564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30032596 (or 30032594 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 1321433564 is about 36351.5276707871. The cubic root of 1321433564 is about 1097.3582789970.

Adding to 1321433564 its reverse (4653341231), we get a palindrome (5974774795).

The spelling of 1321433564 in words is "one billion, three hundred twenty-one million, four hundred thirty-three thousand, five hundred sixty-four".