2181252 has 24 divisors (see below), whose sum is σ = 5167456. Its totient is φ = 715968.

The previous prime is 2181247. The next prime is 2181259. The reversal of 2181252 is 2521812.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (2181259) 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, 553 + ... + 2160.

2^2181252 is an apocalyptic number.

It is an amenable number.

2181252 is an abundant number, since it is smaller than the sum of its proper divisors (2986204).

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

2181252 is a wasteful number, since it uses less digits than its factorization.

2181252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787 (or 2785 counting only the distinct ones).

The product of its digits is 320, while the sum is 21.

The square root of 2181252 is about 1476.9062258654. The cubic root of 2181252 is about 129.6886434408.

The spelling of 2181252 in words is "two million, one hundred eighty-one thousand, two hundred fifty-two".