1281445360 has 80 divisors (see below), whose sum is σ = 3221981280. Its totient is φ = 471168000.

The previous prime is 1281445349. The next prime is 1281445379. The reversal of 1281445360 is 635441821.

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

It is a plaindrome in base 15.

It is a zygodrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258586 + ... + 263494.

It is an arithmetic number, because the mean of its divisors is an integer number (40274766).

Almost surely, 2^1281445360 is an apocalyptic number.

1281445360 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 1281445360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1610990640).

1281445360 is an abundant number, since it is smaller than the sum of its proper divisors (1940535920).

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

1281445360 is a wasteful number, since it uses less digits than its factorization.

1281445360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5186 (or 5180 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 1281445360 is about 35797.2814610272. The cubic root of 1281445360 is about 1086.1755711019.

The spelling of 1281445360 in words is "one billion, two hundred eighty-one million, four hundred forty-five thousand, three hundred sixty".