1881191 has 8 divisors (see below), whose sum is σ = 2081184. Its totient is φ = 1689120.

The previous prime is 1881181. The next prime is 1881197. The reversal of 1881191 is 1911881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1881191 - 2⁶ = 1881127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1475 + ... + 2436.

It is an arithmetic number, because the mean of its divisors is an integer number (260148).

2^1881191 is an apocalyptic number.

1881191 is a deficient number, since it is larger than the sum of its proper divisors (199993).

1881191 is a wasteful number, since it uses less digits than its factorization.

1881191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961.

The product of its digits is 576, while the sum is 29.

The square root of 1881191 is about 1371.5651643287. The cubic root of 1881191 is about 123.4461730059.

The spelling of 1881191 in words is "one million, eight hundred eighty-one thousand, one hundred ninety-one".