1284500055 has 16 divisors (see below), whose sum is σ = 2055646944. Its totient is φ = 684917760.

The previous prime is 1284500051. The next prime is 1284500069. The reversal of 1284500055 is 5500054821.

It is not a de Polignac number, because 1284500055 - 2² = 1284500051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1284499995 and 1284500031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284500051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119295 + ... + 129615.

It is an arithmetic number, because the mean of its divisors is an integer number (128477934).

Almost surely, 2^1284500055 is an apocalyptic number.

1284500055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1284500055 is a deficient number, since it is larger than the sum of its proper divisors (771146889).

1284500055 is a wasteful number, since it uses less digits than its factorization.

1284500055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18626.

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 1284500055 is about 35839.9226422156. The cubic root of 1284500055 is about 1087.0379572421.

Adding to 1284500055 its reverse (5500054821), we get a palindrome (6784554876).

The spelling of 1284500055 in words is "one billion, two hundred eighty-four million, five hundred thousand, fifty-five".