1321887316 has 24 divisors (see below), whose sum is σ = 2329012224. Its totient is φ = 656466720.

The previous prime is 1321887253. The next prime is 1321887317. The reversal of 1321887316 is 6137881231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321887317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 834261 + ... + 835843.

It is an arithmetic number, because the mean of its divisors is an integer number (97042176).

Almost surely, 2^1321887316 is an apocalyptic number.

It is an amenable number.

1321887316 is a deficient number, since it is larger than the sum of its proper divisors (1007124908).

1321887316 is a wasteful number, since it uses less digits than its factorization.

1321887316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871 (or 2869 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 1321887316 is about 36357.7683033489. The cubic root of 1321887316 is about 1097.4838677378.

The spelling of 1321887316 in words is "one billion, three hundred twenty-one million, eight hundred eighty-seven thousand, three hundred sixteen".