1284420055185 has 64 divisors (see below), whose sum is σ = 2297814220800. Its totient is φ = 680706415296.

The previous prime is 1284420055133. The next prime is 1284420055187. The reversal of 1284420055185 is 5815500244821.

1284420055185 is a `hidden beast` number, since 1 + 28 + 442 + 0 + 0 + 5 + 5 + 185 = 666.

It is not a de Polignac number, because 1284420055185 - 2⁷ = 1284420055057 is a prime.

It is a super-2 number, since 2×1284420055185² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1284420055185.

It is not an unprimeable number, because it can be changed into a prime (1284420055187) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 91954072 + ... + 91968038.

It is an arithmetic number, because the mean of its divisors is an integer number (35903347200).

Almost surely, 2^{1284420055185} is an apocalyptic number.

1284420055185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1284420055185 is a deficient number, since it is larger than the sum of its proper divisors (1013394165615).

1284420055185 is a wasteful number, since it uses less digits than its factorization.

1284420055185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18227 (or 18221 counting only the distinct ones).

The product of its (nonzero) digits is 512000, while the sum is 45.

The spelling of 1284420055185 in words is "one trillion, two hundred eighty-four billion, four hundred twenty million, fifty-five thousand, one hundred eighty-five".