1881155 has 4 divisors (see below), whose sum is σ = 2257392. Its totient is φ = 1504920.

The previous prime is 1881151. The next prime is 1881157. The reversal of 1881155 is 5511881.

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

It is not a de Polignac number, because 1881155 - 2² = 1881151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1881151) 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, 188111 + ... + 188120.

It is an arithmetic number, because the mean of its divisors is an integer number (564348).

2^1881155 is an apocalyptic number.

1881155 is a deficient number, since it is larger than the sum of its proper divisors (376237).

1881155 is an equidigital number, since it uses as much as digits as its factorization.

1881155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376236.

The product of its digits is 1600, while the sum is 29.

The square root of 1881155 is about 1371.5520405730. The cubic root of 1881155 is about 123.4453855455.

The spelling of 1881155 in words is "one million, eight hundred eighty-one thousand, one hundred fifty-five".