1321375 has 24 divisors (see below), whose sum is σ = 1858896. Its totient is φ = 930000.

The previous prime is 1321363. The next prime is 1321379. The reversal of 1321375 is 5731231.

It is not a de Polignac number, because 1321375 - 2⁷ = 1321247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42610 + ... + 42640.

It is an arithmetic number, because the mean of its divisors is an integer number (77454).

2^1321375 is an apocalyptic number.

1321375 is a deficient number, since it is larger than the sum of its proper divisors (537521).

1321375 is an equidigital number, since it uses as much as digits as its factorization.

1321375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 47 counting only the distinct ones).

The product of its digits is 630, while the sum is 22.

The square root of 1321375 is about 1149.5107654998. The cubic root of 1321375 is about 109.7342067654.

The spelling of 1321375 in words is "one million, three hundred twenty-one thousand, three hundred seventy-five".