1280554240 has 216 divisors, whose sum is σ = 3781150632. Its totient is φ = 412876800.

The previous prime is 1280554211. The next prime is 1280554241. The reversal of 1280554240 is 424550821.

1280554240 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12054784 + 1268499456 = 3472^2 + 35616^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280554241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1065640 + ... + 1066840.

It is an arithmetic number, because the mean of its divisors is an integer number (17505327).

Almost surely, 2^1280554240 is an apocalyptic number.

1280554240 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 1280554240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1890575316).

1280554240 is an abundant number, since it is smaller than the sum of its proper divisors (2500596392).

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

1280554240 is a wasteful number, since it uses less digits than its factorization.

1280554240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253 (or 1232 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 1280554240 is about 35784.8325411759. The cubic root of 1280554240 is about 1085.9237364016.

The spelling of 1280554240 in words is "one billion, two hundred eighty million, five hundred fifty-four thousand, two hundred forty".