1881842 has 4 divisors (see below), whose sum is σ = 2822766. Its totient is φ = 940920.

The previous prime is 1881823. The next prime is 1881851. The reversal of 1881842 is 2481881.

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

It can be written as a sum of positive squares in only one way, i.e., 1207801 + 674041 = 1099^2 + 821^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1881799 and 1881808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 470459 + ... + 470462.

2^1881842 is an apocalyptic number.

1881842 is a deficient number, since it is larger than the sum of its proper divisors (940924).

1881842 is an equidigital number, since it uses as much as digits as its factorization.

1881842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940923.

The product of its digits is 4096, while the sum is 32.

The square root of 1881842 is about 1371.8024639138. The cubic root of 1881842 is about 123.4604111828.

The spelling of 1881842 in words is "one million, eight hundred eighty-one thousand, eight hundred forty-two".