1280780841 has 8 divisors (see below), whose sum is σ = 1762795264. Its totient is φ = 826310160.

The previous prime is 1280780819. The next prime is 1280780873. The reversal of 1280780841 is 1480870821.

It is a happy number.

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

It is not a de Polignac number, because 1280780841 - 2⁷ = 1280780713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1280780841.

It is not an unprimeable number, because it can be changed into a prime (1280780341) 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, 6885826 + ... + 6886011.

It is an arithmetic number, because the mean of its divisors is an integer number (220349408).

Almost surely, 2^1280780841 is an apocalyptic number.

It is an amenable number.

1280780841 is a deficient number, since it is larger than the sum of its proper divisors (482014423).

1280780841 is a wasteful number, since it uses less digits than its factorization.

1280780841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13771871.

The product of its (nonzero) digits is 28672, while the sum is 39.

The square root of 1280780841 is about 35787.9985609701. The cubic root of 1280780841 is about 1085.9877859837.

The spelling of 1280780841 in words is "one billion, two hundred eighty million, seven hundred eighty thousand, eight hundred forty-one".