630281 has 2 divisors, whose sum is σ = 630282. Its totient is φ = 630280.

The previous prime is 630263. The next prime is 630299. The reversal of 630281 is 182036.

It is a balanced prime because it is at equal distance from previous prime (630263) and next prime (630299).

It can be written as a sum of positive squares in only one way, i.e., 614656 + 15625 = 784^2 + 125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630281 is a prime.

It is a super-2 number, since 2×630281² = 794508277922, which contains 22 as substring.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 630281.

It is not a weakly prime, because it can be changed into another prime (630181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315140 + 315141.

It is an arithmetic number, because the mean of its divisors is an integer number (315141).

2⁶³⁰²⁸¹ is an apocalyptic number.

It is an amenable number.

630281 is a deficient number, since it is larger than the sum of its proper divisors (1).

630281 is an equidigital number, since it uses as much as digits as its factorization.

630281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 630281 is about 793.9023869469. The cubic root of 630281 is about 85.7389324625.

The spelling of 630281 in words is "six hundred thirty thousand, two hundred eighty-one".