2181459 has 16 divisors (see below), whose sum is σ = 3372032. Its totient is φ = 1228608.

The previous prime is 2181449. The next prime is 2181461. The reversal of 2181459 is 9541812.

It is a happy number.

It is not a de Polignac number, because 2181459 - 2⁷ = 2181331 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2181419) 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, 822 + ... + 2244.

It is an arithmetic number, because the mean of its divisors is an integer number (210752).

2^2181459 is an apocalyptic number.

2181459 is a deficient number, since it is larger than the sum of its proper divisors (1190573).

2181459 is a wasteful number, since it uses less digits than its factorization.

2181459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506.

The product of its digits is 2880, while the sum is 30.

The square root of 2181459 is about 1476.9763031274. The cubic root of 2181459 is about 129.6927457790.

The spelling of 2181459 in words is "two million, one hundred eighty-one thousand, four hundred fifty-nine".