2181275 has 6 divisors (see below), whose sum is σ = 2704812. Its totient is φ = 1745000.

The previous prime is 2181271. The next prime is 2181329. The reversal of 2181275 is 5721812.

It is not a de Polignac number, because 2181275 - 2² = 2181271 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 43601 + ... + 43650.

It is an arithmetic number, because the mean of its divisors is an integer number (450802).

2^2181275 is an apocalyptic number.

2181275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2181275 is a deficient number, since it is larger than the sum of its proper divisors (523537).

2181275 is an equidigital number, since it uses as much as digits as its factorization.

2181275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87261 (or 87256 counting only the distinct ones).

The product of its digits is 1120, while the sum is 26.

The square root of 2181275 is about 1476.9140123921. The cubic root of 2181275 is about 129.6890992690.

The spelling of 2181275 in words is "two million, one hundred eighty-one thousand, two hundred seventy-five".