1284318855 has 16 divisors (see below), whose sum is σ = 2283233760. Its totient is φ = 684969984.

The previous prime is 1284318821. The next prime is 1284318859. The reversal of 1284318855 is 5588134821.

1284318855 is a `hidden beast` number, since 1 + 284 + 318 + 8 + 55 = 666.

It is not a de Polignac number, because 1284318855 - 2⁸ = 1284318599 is a prime.

It is a super-2 number, since 2×1284318855² = 3298949842617022050, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1284318855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284318859) 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, 4756602 + ... + 4756871.

It is an arithmetic number, because the mean of its divisors is an integer number (142702110).

Almost surely, 2^1284318855 is an apocalyptic number.

1284318855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1284318855 is a deficient number, since it is larger than the sum of its proper divisors (998914905).

1284318855 is an equidigital number, since it uses as much as digits as its factorization.

1284318855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9513487 (or 9513481 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 1284318855 is about 35837.3946458165. The cubic root of 1284318855 is about 1086.9868399378.

The spelling of 1284318855 in words is "one billion, two hundred eighty-four million, three hundred eighteen thousand, eight hundred fifty-five".