1280252866 has 8 divisors (see below), whose sum is σ = 1923367824. Its totient is φ = 639130260.

The previous prime is 1280252777. The next prime is 1280252893. The reversal of 1280252866 is 6682520821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496480 + ... + 499051.

It is an arithmetic number, because the mean of its divisors is an integer number (240420978).

Almost surely, 2^1280252866 is an apocalyptic number.

1280252866 is a deficient number, since it is larger than the sum of its proper divisors (643114958).

1280252866 is an equidigital number, since it uses as much as digits as its factorization.

1280252866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996176.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 1280252866 is about 35780.6213752640. The cubic root of 1280252866 is about 1085.8385402558.

The spelling of 1280252866 in words is "one billion, two hundred eighty million, two hundred fifty-two thousand, eight hundred sixty-six".