1281681360 has 160 divisors (see below), whose sum is σ = 4557327360. Its totient is φ = 330739200.

The previous prime is 1281681343. The next prime is 1281681377. The reversal of 1281681360 is 631861821.

It is an interprime number because it is at equal distance from previous prime (1281681343) and next prime (1281681377).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57390 + ... + 76530.

It is an arithmetic number, because the mean of its divisors is an integer number (28483296).

Almost surely, 2^1281681360 is an apocalyptic number.

1281681360 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 1281681360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2278663680).

1281681360 is an abundant number, since it is smaller than the sum of its proper divisors (3275646000).

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

1281681360 is a wasteful number, since it uses less digits than its factorization.

1281681360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19194 (or 19182 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1281681360 is about 35800.5776489710. The cubic root of 1281681360 is about 1086.2422462559.

The spelling of 1281681360 in words is "one billion, two hundred eighty-one million, six hundred eighty-one thousand, three hundred sixty".