1321541316 has 18 divisors (see below), whose sum is σ = 3340562862. Its totient is φ = 440513760.

The previous prime is 1321541311. The next prime is 1321541329. The reversal of 1321541316 is 6131451231.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1246372416 + 75168900 = 35304^2 + 8670^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1321541316.

It is not an unprimeable number, because it can be changed into a prime (1321541311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18354705 + ... + 18354776.

Almost surely, 2^1321541316 is an apocalyptic number.

It is an amenable number.

1321541316 is an abundant number, since it is smaller than the sum of its proper divisors (2019021546).

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

1321541316 is a wasteful number, since it uses less digits than its factorization.

1321541316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36709491 (or 36709486 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1321541316 is about 36353.0097240930. The cubic root of 1321541316 is about 1097.3881050230.

Adding to 1321541316 its reverse (6131451231), we get a palindrome (7452992547).

The spelling of 1321541316 in words is "one billion, three hundred twenty-one million, five hundred forty-one thousand, three hundred sixteen".