2181876 has 24 divisors (see below), whose sum is σ = 5125344. Its totient is φ = 722400.

The previous prime is 2181871. The next prime is 2181889. The reversal of 2181876 is 6781812.

It is a happy number.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181871) 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, 1551 + ... + 2601.

It is an arithmetic number, because the mean of its divisors is an integer number (213556).

2^2181876 is an apocalyptic number.

It is an amenable number.

2181876 is an abundant number, since it is smaller than the sum of its proper divisors (2943468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2181876 is a wasteful number, since it uses less digits than its factorization.

2181876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231 (or 1229 counting only the distinct ones).

The product of its digits is 5376, while the sum is 33.

The square root of 2181876 is about 1477.1174631694. The cubic root of 2181876 is about 129.7010091216.

The spelling of 2181876 in words is "two million, one hundred eighty-one thousand, eight hundred seventy-six".