2181276 has 48 divisors (see below), whose sum is σ = 5958400. Its totient is φ = 688176.

The previous prime is 2181271. The next prime is 2181329. The reversal of 2181276 is 6721812.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 (2181271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1521 + ... + 2583.

2^2181276 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 2181276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2979200).

2181276 is an abundant number, since it is smaller than the sum of its proper divisors (3777124).

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

2181276 is a wasteful number, since it uses less digits than its factorization.

2181276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095 (or 1087 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 2181276 is about 1476.9143509358. The cubic root of 2181276 is about 129.6891190875.

The spelling of 2181276 in words is "two million, one hundred eighty-one thousand, two hundred seventy-six".