1321341865 has 8 divisors (see below), whose sum is σ = 1585935360. Its totient is φ = 1056856752.

The previous prime is 1321341851. The next prime is 1321341899. The reversal of 1321341865 is 5681431231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321341865 - 2¹⁹ = 1320817577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321341865.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2712 + ... + 51478.

It is an arithmetic number, because the mean of its divisors is an integer number (198241920).

Almost surely, 2^1321341865 is an apocalyptic number.

It is an amenable number.

1321341865 is a deficient number, since it is larger than the sum of its proper divisors (264593495).

1321341865 is an equidigital number, since it uses as much as digits as its factorization.

1321341865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54191.

The product of its digits is 17280, while the sum is 34.

The square root of 1321341865 is about 36350.2663676623. The cubic root of 1321341865 is about 1097.3328952049.

The spelling of 1321341865 in words is "one billion, three hundred twenty-one million, three hundred forty-one thousand, eight hundred sixty-five".