3120281 has 2 divisors, whose sum is σ = 3120282. Its totient is φ = 3120280.

The previous prime is 3120277. The next prime is 3120287. The reversal of 3120281 is 1820213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2088025 + 1032256 = 1445^2 + 1016^2 .

It is an emirp because it is prime and its reverse (1820213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3120281 - 2² = 3120277 is a prime.

It is a super-2 number, since 2×3120281² = 19472307037922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3120287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560140 + 1560141.

It is an arithmetic number, because the mean of its divisors is an integer number (1560141).

Almost surely, 2^3120281 is an apocalyptic number.

It is an amenable number.

3120281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3120281 is an equidigital number, since it uses as much as digits as its factorization.

3120281 is an odious number, because the sum of its binary digits is odd.

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

The square root of 3120281 is about 1766.4317139363. The cubic root of 3120281 is about 146.1272581580.

Adding to 3120281 its reverse (1820213), we get a palindrome (4940494).

The spelling of 3120281 in words is "three million, one hundred twenty thousand, two hundred eighty-one".