1881943 has 12 divisors (see below), whose sum is σ = 2211600. Its totient is φ = 1596672.

The previous prime is 1881937. The next prime is 1881949. The reversal of 1881943 is 3491881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1881937) and next prime (1881949).

It is not a de Polignac number, because 1881943 - 2⁹ = 1881431 is a prime.

It is a Duffinian number.

1881943 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1881899 and 1881908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9358 + ... + 9556.

It is an arithmetic number, because the mean of its divisors is an integer number (184300).

2^1881943 is an apocalyptic number.

1881943 is a deficient number, since it is larger than the sum of its proper divisors (329657).

1881943 is a wasteful number, since it uses less digits than its factorization.

1881943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 399 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 1881943 is about 1371.8392763003. The cubic root of 1881943 is about 123.4626198837.

The spelling of 1881943 in words is "one million, eight hundred eighty-one thousand, nine hundred forty-three".