1280604939 has 8 divisors (see below), whose sum is σ = 1766351760. Its totient is φ = 824297376.

The previous prime is 1280604893. The next prime is 1280604967. The reversal of 1280604939 is 9394060821.

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

It is not a de Polignac number, because 1280604939 - 2²¹ = 1278507787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1280604939.

It is not an unprimeable number, because it can be changed into a prime (1280604979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7359712 + ... + 7359885.

It is an arithmetic number, because the mean of its divisors is an integer number (220793970).

Almost surely, 2^1280604939 is an apocalyptic number.

1280604939 is a deficient number, since it is larger than the sum of its proper divisors (485746821).

1280604939 is a wasteful number, since it uses less digits than its factorization.

1280604939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14719629.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 1280604939 is about 35785.5409208803. The cubic root of 1280604939 is about 1085.9380673112.

The spelling of 1280604939 in words is "one billion, two hundred eighty million, six hundred four thousand, nine hundred thirty-nine".