1881355 has 16 divisors (see below), whose sum is σ = 2635200. Its totient is φ = 1288896.

The previous prime is 1881349. The next prime is 1881389. The reversal of 1881355 is 5531881.

It is not a de Polignac number, because 1881355 - 2⁹ = 1880843 is a prime.

1881355 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1167 + ... + 2263.

It is an arithmetic number, because the mean of its divisors is an integer number (164700).

2^1881355 is an apocalyptic number.

1881355 is a deficient number, since it is larger than the sum of its proper divisors (753845).

1881355 is an equidigital number, since it uses as much as digits as its factorization.

1881355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123 (or 1109 counting only the distinct ones).

The product of its digits is 4800, while the sum is 31.

The square root of 1881355 is about 1371.6249487378. The cubic root of 1881355 is about 123.4497601987.

The spelling of 1881355 in words is "one million, eight hundred eighty-one thousand, three hundred fifty-five".