1880005 has 4 divisors (see below), whose sum is σ = 2256012. Its totient is φ = 1504000.

The previous prime is 1879967. The next prime is 1880017. The reversal of 1880005 is 5000881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 923521 + 956484 = 961^2 + 978^2 .

It is not a de Polignac number, because 1880005 - 2¹³ = 1871813 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.

1880005 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187996 + ... + 188005.

It is an arithmetic number, because the mean of its divisors is an integer number (564003).

2^1880005 is an apocalyptic number.

It is an amenable number.

1880005 is a deficient number, since it is larger than the sum of its proper divisors (376007).

1880005 is an equidigital number, since it uses as much as digits as its factorization.

1880005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376006.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 1880005 is about 1371.1327433914. The cubic root of 1880005 is about 123.4202252704.

Adding to 1880005 its reverse (5000881), we get a palindrome (6880886).

The spelling of 1880005 in words is "one million, eight hundred eighty thousand, five".