1280631327 has 4 divisors (see below), whose sum is σ = 1707508440. Its totient is φ = 853754216.

The previous prime is 1280631311. The next prime is 1280631353. The reversal of 1280631327 is 7231360821.

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

It is a cyclic number.

It is not a de Polignac number, because 1280631327 - 2⁴ = 1280631311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280631397) 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, 213438552 + ... + 213438557.

It is an arithmetic number, because the mean of its divisors is an integer number (426877110).

Almost surely, 2^1280631327 is an apocalyptic number.

1280631327 is a deficient number, since it is larger than the sum of its proper divisors (426877113).

1280631327 is an equidigital number, since it uses as much as digits as its factorization.

1280631327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426877112.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 1280631327 is about 35785.9096153779. The cubic root of 1280631327 is about 1085.9455261655.

The spelling of 1280631327 in words is "one billion, two hundred eighty million, six hundred thirty-one thousand, three hundred twenty-seven".