1280478581142 has 16 divisors (see below), whose sum is σ = 2643568684032. Its totient is φ = 413057606760.

The previous prime is 1280478581117. The next prime is 1280478581149. The reversal of 1280478581142 is 2411858740821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280478581149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3442146538 + ... + 3442146909.

It is an arithmetic number, because the mean of its divisors is an integer number (165223042752).

Almost surely, 2^{1280478581142} is an apocalyptic number.

1280478581142 is an abundant number, since it is smaller than the sum of its proper divisors (1363090102890).

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

1280478581142 is a wasteful number, since it uses less digits than its factorization.

1280478581142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6884293483.

The product of its (nonzero) digits is 1146880, while the sum is 51.

The spelling of 1280478581142 in words is "one trillion, two hundred eighty billion, four hundred seventy-eight million, five hundred eighty-one thousand, one hundred forty-two".