1321567375 has 32 divisors (see below), whose sum is σ = 1711936512. Its totient is φ = 1017828000.

The previous prime is 1321567361. The next prime is 1321567393. The reversal of 1321567375 is 5737651231.

It is a happy number.

It is not a de Polignac number, because 1321567375 - 2⁵ = 1321567343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 379894 + ... + 383356.

It is an arithmetic number, because the mean of its divisors is an integer number (53498016).

It is a vampire number, since it can be written as 17315 ⋅ 76325 (with its own digits).

Almost surely, 2^1321567375 is an apocalyptic number.

1321567375 is a deficient number, since it is larger than the sum of its proper divisors (390369137).

1321567375 is an equidigital number, since it uses as much as digits as its factorization.

1321567375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3592 (or 3582 counting only the distinct ones).

The product of its digits is 132300, while the sum is 40.

The square root of 1321567375 is about 36353.3681383170. The cubic root of 1321567375 is about 1097.3953179767.

The spelling of 1321567375 in words is "one billion, three hundred twenty-one million, five hundred sixty-seven thousand, three hundred seventy-five".