1372321 has 4 divisors (see below), whose sum is σ = 1374912. Its totient is φ = 1369732.

The previous prime is 1372307. The next prime is 1372331. The reversal of 1372321 is 1232731.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1232731 = 23 ⋅53597.

It is a cyclic number.

It is not a de Polignac number, because 1372321 - 2¹⁷ = 1241249 is a prime.

It is a super-3 number, since 3×1372321³ = 7753332023825496483, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1372331) 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, 181 + ... + 1666.

It is an arithmetic number, because the mean of its divisors is an integer number (343728).

2^1372321 is an apocalyptic number.

It is an amenable number.

1372321 is a deficient number, since it is larger than the sum of its proper divisors (2591).

1372321 is an equidigital number, since it uses as much as digits as its factorization.

1372321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590.

The product of its digits is 252, while the sum is 19.

The square root of 1372321 is about 1171.4610535566. The cubic root of 1372321 is about 111.1267388759.

The spelling of 1372321 in words is "one million, three hundred seventy-two thousand, three hundred twenty-one".