1881869 has 4 divisors (see below), whose sum is σ = 2052960. Its totient is φ = 1710780.

The previous prime is 1881863. The next prime is 1881881. The reversal of 1881869 is 9681881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1881869 - 2⁴ = 1881853 is a prime.

It is a super-2 number, since 2×1881869² = 7082861866322, 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 (1881863) 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, 85529 + ... + 85550.

It is an arithmetic number, because the mean of its divisors is an integer number (513240).

2^1881869 is an apocalyptic number.

It is an amenable number.

1881869 is a deficient number, since it is larger than the sum of its proper divisors (171091).

1881869 is a wasteful number, since it uses less digits than its factorization.

1881869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171090.

The product of its digits is 27648, while the sum is 41.

The square root of 1881869 is about 1371.8123049455. The cubic root of 1881869 is about 123.4610016353.

The spelling of 1881869 in words is "one million, eight hundred eighty-one thousand, eight hundred sixty-nine".