1280802426 has 64 divisors (see below), whose sum is σ = 2829358080. Its totient is φ = 384721920.

The previous prime is 1280802401. The next prime is 1280802427. The reversal of 1280802426 is 6242080821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1280802427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 504781 + ... + 507311.

It is an arithmetic number, because the mean of its divisors is an integer number (44208720).

Almost surely, 2^1280802426 is an apocalyptic number.

1280802426 is an abundant number, since it is smaller than the sum of its proper divisors (1548555654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1280802426 is a wasteful number, since it uses less digits than its factorization.

1280802426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 1280802426 is about 35788.3001272762. The cubic root of 1280802426 is about 1085.9938866669.

The spelling of 1280802426 in words is "one billion, two hundred eighty million, eight hundred two thousand, four hundred twenty-six".