1285756801 has 16 divisors (see below), whose sum is σ = 1564047360. Its totient is φ = 1031800320.

The previous prime is 1285756793. The next prime is 1285756819. The reversal of 1285756801 is 1086575821.

It is a cyclic number.

It is not a de Polignac number, because 1285756801 - 2³ = 1285756793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285756891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5556 + ... + 51013.

It is an arithmetic number, because the mean of its divisors is an integer number (97752960).

Almost surely, 2^1285756801 is an apocalyptic number.

It is an amenable number.

1285756801 is a deficient number, since it is larger than the sum of its proper divisors (278290559).

1285756801 is a wasteful number, since it uses less digits than its factorization.

1285756801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56784.

The product of its (nonzero) digits is 134400, while the sum is 43.

The square root of 1285756801 is about 35857.4511224655. The cubic root of 1285756801 is about 1087.3923585008.

The spelling of 1285756801 in words is "one billion, two hundred eighty-five million, seven hundred fifty-six thousand, eight hundred one".