1375321 has 4 divisors (see below), whose sum is σ = 1378944. Its totient is φ = 1371700.

The previous prime is 1375313. The next prime is 1375337. The reversal of 1375321 is 1235731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1375321 - 2³ = 1375313 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1375321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1375292 and 1375301.

It is not an unprimeable number, because it can be changed into a prime (1375021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165 + ... + 2026.

It is an arithmetic number, because the mean of its divisors is an integer number (344736).

2^1375321 is an apocalyptic number.

It is an amenable number.

1375321 is a deficient number, since it is larger than the sum of its proper divisors (3623).

1375321 is an equidigital number, since it uses as much as digits as its factorization.

1375321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622.

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

The square root of 1375321 is about 1172.7408068282. The cubic root of 1375321 is about 111.2076571595.

The spelling of 1375321 in words is "one million, three hundred seventy-five thousand, three hundred twenty-one".