1882381 has 4 divisors (see below), whose sum is σ = 1885852. Its totient is φ = 1878912.

The previous prime is 1882369. The next prime is 1882403. The reversal of 1882381 is 1832881.

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 1010025 + 872356 = 1005^2 + 934^2 .

It is a cyclic number.

It is not a de Polignac number, because 1882381 - 2⁷ = 1882253 is a prime.

It is a super-2 number, since 2×1882381² = 7086716458322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1882081) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 726 + ... + 2071.

It is an arithmetic number, because the mean of its divisors is an integer number (471463).

2^1882381 is an apocalyptic number.

It is an amenable number.

1882381 is a deficient number, since it is larger than the sum of its proper divisors (3471).

1882381 is an equidigital number, since it uses as much as digits as its factorization.

1882381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3470.

The product of its digits is 3072, while the sum is 31.

The square root of 1882381 is about 1371.9989067051. The cubic root of 1882381 is about 123.4721972961.

The spelling of 1882381 in words is "one million, eight hundred eighty-two thousand, three hundred eighty-one".