1331873 has 4 divisors (see below), whose sum is σ = 1340208. Its totient is φ = 1323540.

The previous prime is 1331857. The next prime is 1331921. The reversal of 1331873 is 3781331.

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: 3781331 = 211 ⋅17921.

It is a cyclic number.

It is not a de Polignac number, because 1331873 - 2⁴ = 1331857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331573) 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, 3923 + ... + 4248.

It is an arithmetic number, because the mean of its divisors is an integer number (335052).

2^1331873 is an apocalyptic number.

It is an amenable number.

1331873 is a deficient number, since it is larger than the sum of its proper divisors (8335).

1331873 is an equidigital number, since it uses as much as digits as its factorization.

1331873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8334.

The product of its digits is 1512, while the sum is 26.

The square root of 1331873 is about 1154.0680222587. The cubic root of 1331873 is about 110.0240443307.

The spelling of 1331873 in words is "one million, three hundred thirty-one thousand, eight hundred seventy-three".