1280318532 has 12 divisors (see below), whose sum is σ = 2987409936. Its totient is φ = 426772840.

The previous prime is 1280318519. The next prime is 1280318539. The reversal of 1280318532 is 2358130821.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1280318493 and 1280318502.

It is not an unprimeable number, because it can be changed into a prime (1280318539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53346594 + ... + 53346617.

It is an arithmetic number, because the mean of its divisors is an integer number (248950828).

Almost surely, 2^1280318532 is an apocalyptic number.

1280318532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1280318532 is an abundant number, since it is smaller than the sum of its proper divisors (1707091404).

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

1280318532 is a wasteful number, since it uses less digits than its factorization.

1280318532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106693218 (or 106693216 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 1280318532 is about 35781.5389831125. The cubic root of 1280318532 is about 1085.8571046755.

The spelling of 1280318532 in words is "one billion, two hundred eighty million, three hundred eighteen thousand, five hundred thirty-two".