1280547084 has 48 divisors (see below), whose sum is σ = 3121665120. Its totient is φ = 408038400.

The previous prime is 1280547019. The next prime is 1280547109. The reversal of 1280547084 is 4807450821.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16932 + ... + 53364.

It is an arithmetic number, because the mean of its divisors is an integer number (65034690).

Almost surely, 2^1280547084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280547084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1560832560).

1280547084 is an abundant number, since it is smaller than the sum of its proper divisors (1841118036).

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

1280547084 is a wasteful number, since it uses less digits than its factorization.

1280547084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36570 (or 36568 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 1280547084 is about 35784.7325545406. The cubic root of 1280547084 is about 1085.9217136096.

The spelling of 1280547084 in words is "one billion, two hundred eighty million, five hundred forty-seven thousand, eighty-four".