1281107268 has 144 divisors (see below), whose sum is σ = 3920716800. Its totient is φ = 344786112.

The previous prime is 1281107189. The next prime is 1281107287. The reversal of 1281107268 is 8627011821.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 386683 + ... + 389981.

It is an arithmetic number, because the mean of its divisors is an integer number (27227200).

Almost surely, 2^1281107268 is an apocalyptic number.

1281107268 is a gapful number since it is divisible by the number (18) 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 1281107268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1960358400).

1281107268 is an abundant number, since it is smaller than the sum of its proper divisors (2639609532).

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

1281107268 is a wasteful number, since it uses less digits than its factorization.

1281107268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406 (or 3401 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 1281107268 is about 35792.5588356016. The cubic root of 1281107268 is about 1086.0800384627.

The spelling of 1281107268 in words is "one billion, two hundred eighty-one million, one hundred seven thousand, two hundred sixty-eight".