2130281 has 4 divisors (see below), whose sum is σ = 2135364. Its totient is φ = 2125200.

The previous prime is 2130269. The next prime is 2130307. The reversal of 2130281 is 1820312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 737881 + 1392400 = 859^2 + 1180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2130281 is a prime.

It is a super-3 number, since 3×2130281³ = 29002266333848934123, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (2130241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1850 + ... + 2771.

It is an arithmetic number, because the mean of its divisors is an integer number (533841).

2^2130281 is an apocalyptic number.

It is an amenable number.

2130281 is a deficient number, since it is larger than the sum of its proper divisors (5083).

2130281 is an equidigital number, since it uses as much as digits as its factorization.

2130281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5082.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2130281 is about 1459.5482177715. The cubic root of 2130281 is about 128.6704929047.

Adding to 2130281 its reverse (1820312), we get a palindrome (3950593).

The spelling of 2130281 in words is "two million, one hundred thirty thousand, two hundred eighty-one".