2181002 has 8 divisors (see below), whose sum is σ = 3360036. Its totient is φ = 1060992.

The previous prime is 2180999. The next prime is 2181007. The reversal of 2181002 is 2001812.

It can be written as a sum of positive squares in 2 ways, for example, as 2163841 + 17161 = 1471^2 + 131^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2181007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14663 + ... + 14810.

2^2181002 is an apocalyptic number.

2181002 is a deficient number, since it is larger than the sum of its proper divisors (1179034).

2181002 is a wasteful number, since it uses less digits than its factorization.

2181002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29512.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2181002 is about 1476.8215870578. The cubic root of 2181002 is about 129.6836885801.

Adding to 2181002 its reverse (2001812), we get a palindrome (4182814).

The spelling of 2181002 in words is "two million, one hundred eighty-one thousand, two".