1280052128 has 48 divisors (see below), whose sum is σ = 2693404224. Its totient is φ = 596720640.

The previous prime is 1280052127. The next prime is 1280052133. The reversal of 1280052128 is 8212500821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1280052128.

It is not an unprimeable number, because it can be changed into a prime (1280052127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47213 + ... + 69203.

It is an arithmetic number, because the mean of its divisors is an integer number (56112588).

Almost surely, 2^1280052128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280052128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1346702112).

1280052128 is an abundant number, since it is smaller than the sum of its proper divisors (1413352096).

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

1280052128 is a wasteful number, since it uses less digits than its factorization.

1280052128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22125 (or 22117 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 1280052128 is about 35777.8161435267. The cubic root of 1280052128 is about 1085.7817857255.

Adding to 1280052128 its reverse (8212500821), we get a palindrome (9492552949).

The spelling of 1280052128 in words is "one billion, two hundred eighty million, fifty-two thousand, one hundred twenty-eight".