1280715072 has 224 divisors, whose sum is σ = 4353226752. Its totient is φ = 322983936.

The previous prime is 1280715067. The next prime is 1280715089. The reversal of 1280715072 is 2705170821.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400263 + ... + 403449.

It is an arithmetic number, because the mean of its divisors is an integer number (19434048).

Almost surely, 2^1280715072 is an apocalyptic number.

1280715072 is a gapful number since it is divisible by the number (12) 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 1280715072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2176613376).

1280715072 is an abundant number, since it is smaller than the sum of its proper divisors (3072511680).

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

1280715072 is a wasteful number, since it uses less digits than its factorization.

1280715072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3245 (or 3235 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 1280715072 is about 35787.0796796833. The cubic root of 1280715072 is about 1085.9691969191.

Adding to 1280715072 its reverse (2705170821), we get a palindrome (3985885893).

The spelling of 1280715072 in words is "one billion, two hundred eighty million, seven hundred fifteen thousand, seventy-two".