2181452 has 36 divisors (see below), whose sum is σ = 4734576. Its totient is φ = 861120.

The previous prime is 2181449. The next prime is 2181461. The reversal of 2181452 is 2541812.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4502 + ... + 4962.

It is an arithmetic number, because the mean of its divisors is an integer number (131516).

2^2181452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2181452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2367288).

2181452 is an abundant number, since it is smaller than the sum of its proper divisors (2553124).

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

2181452 is a wasteful number, since it uses less digits than its factorization.

2181452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 483 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 2181452 is about 1476.9739334193. The cubic root of 2181452 is about 129.6926070568.

Subtracting from 2181452 its product of digits (640), we obtain a palindrome (2180812).

The spelling of 2181452 in words is "two million, one hundred eighty-one thousand, four hundred fifty-two".