1281067260 has 96 divisors (see below), whose sum is σ = 3918765312. Its totient is φ = 310110720.

The previous prime is 1281067253. The next prime is 1281067261. The reversal of 1281067260 is 627601821.

It is a super-2 number, since 2×1281067260² = 3282266649287815200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281067261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 786567 + ... + 788193.

It is an arithmetic number, because the mean of its divisors is an integer number (40820472).

Almost surely, 2^1281067260 is an apocalyptic number.

1281067260 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 1281067260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1959382656).

1281067260 is an abundant number, since it is smaller than the sum of its proper divisors (2637698052).

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

1281067260 is a wasteful number, since it uses less digits than its factorization.

1281067260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843 (or 2841 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 1281067260 is about 35791.9999441216. Note that the first 4 decimals coincide. The cubic root of 1281067260 is about 1086.0687325287.

The spelling of 1281067260 in words is "one billion, two hundred eighty-one million, sixty-seven thousand, two hundred sixty".