2730281 has 4 divisors (see below), whose sum is σ = 2874000. Its totient is φ = 2586564.

The previous prime is 2730271. The next prime is 2730347. The reversal of 2730281 is 1820372.

2730281 is nontrivially palindromic in base 9.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2730281 is a prime.

It is a super-2 number, since 2×2730281² = 14908868677922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2730241) 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, 71831 + ... + 71868.

It is an arithmetic number, because the mean of its divisors is an integer number (718500).

2^2730281 is an apocalyptic number.

It is an amenable number.

2730281 is a deficient number, since it is larger than the sum of its proper divisors (143719).

2730281 is a wasteful number, since it uses less digits than its factorization.

2730281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143718.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2730281 is about 1652.3561964661. The cubic root of 2730281 is about 139.7662937576.

Subtracting from 2730281 its reverse (1820372), we obtain a palindrome (909909).

The spelling of 2730281 in words is "two million, seven hundred thirty thousand, two hundred eighty-one".