1280630313 has 24 divisors (see below), whose sum is σ = 1878439680. Its totient is φ = 840576960.

The previous prime is 1280630287. The next prime is 1280630321. The reversal of 1280630313 is 3130360821.

It is a happy number.

1280630313 is a `hidden beast` number, since 1 + 28 + 0 + 630 + 3 + 1 + 3 = 666.

It is not a de Polignac number, because 1280630313 - 2¹⁶ = 1280564777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1280630333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 471028 + ... + 473738.

It is an arithmetic number, because the mean of its divisors is an integer number (78268320).

Almost surely, 2^1280630313 is an apocalyptic number.

It is an amenable number.

1280630313 is a deficient number, since it is larger than the sum of its proper divisors (597809367).

1280630313 is a wasteful number, since it uses less digits than its factorization.

1280630313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3509 (or 3506 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1280630313 is about 35785.8954477878. The cubic root of 1280630313 is about 1085.9452395493.

The spelling of 1280630313 in words is "one billion, two hundred eighty million, six hundred thirty thousand, three hundred thirteen".