1281260080 has 80 divisors (see below), whose sum is σ = 3291378624. Its totient is φ = 461373440.

The previous prime is 1281260069. The next prime is 1281260083. The reversal of 1281260080 is 800621821.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (1281260083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10800 + ... + 51760.

Almost surely, 2^1281260080 is an apocalyptic number.

1281260080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1281260080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1645689312).

1281260080 is an abundant number, since it is smaller than the sum of its proper divisors (2010118544).

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

1281260080 is a wasteful number, since it uses less digits than its factorization.

1281260080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41014 (or 41008 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1281260080 is about 35794.6934614616. The cubic root of 1281260080 is about 1086.1232197191.

The spelling of 1281260080 in words is "one billion, two hundred eighty-one million, two hundred sixty thousand, eighty".