1280824055 has 64 divisors (see below), whose sum is σ = 1867726848. Its totient is φ = 824878080.

The previous prime is 1280824049. The next prime is 1280824087. The reversal of 1280824055 is 5504280821.

It is a happy number.

It is a Cunningham number, because it is equal to 1086³-1.

It is not a de Polignac number, because 1280824055 - 2¹² = 1280819959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8158037 + ... + 8158193.

It is an arithmetic number, because the mean of its divisors is an integer number (29183232).

Almost surely, 2^1280824055 is an apocalyptic number.

1280824055 is a deficient number, since it is larger than the sum of its proper divisors (586902793).

1280824055 is a wasteful number, since it uses less digits than its factorization.

1280824055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376.

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 1280824055 is about 35788.6023057621. The cubic root of 1280824055 is about 1085.9999997174. Note that the first 6 decimals are identical.

It can be divided in two parts, 12808 and 24055, that added together give a palindrome (36863).

The spelling of 1280824055 in words is "one billion, two hundred eighty million, eight hundred twenty-four thousand, fifty-five".