1881273 has 4 divisors (see below), whose sum is σ = 2508368. Its totient is φ = 1254180.

The previous prime is 1881263. The next prime is 1881277. The reversal of 1881273 is 3721881.

It is a happy number.

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 not a de Polignac number, because 1881273 - 2⁵ = 1881241 is a prime.

It is a D-number.

It is a Duffinian number.

1881273 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1881273.

It is not an unprimeable number, because it can be changed into a prime (1881277) 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, 313543 + ... + 313548.

It is an arithmetic number, because the mean of its divisors is an integer number (627092).

2^1881273 is an apocalyptic number.

It is an amenable number.

1881273 is a deficient number, since it is larger than the sum of its proper divisors (627095).

1881273 is an equidigital number, since it uses as much as digits as its factorization.

1881273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627094.

The product of its digits is 2688, while the sum is 30.

The square root of 1881273 is about 1371.5950568590. The cubic root of 1881273 is about 123.4479666284.

The spelling of 1881273 in words is "one million, eight hundred eighty-one thousand, two hundred seventy-three".