1118421285 has 16 divisors (see below), whose sum is σ = 1816184256. Its totient is φ = 587587968.

The previous prime is 1118421281. The next prime is 1118421341. The reversal of 1118421285 is 5821248111.

It is not a de Polignac number, because 1118421285 - 2² = 1118421281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118421281) 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, 555424 + ... + 557433.

It is an arithmetic number, because the mean of its divisors is an integer number (113511516).

Almost surely, 2^1118421285 is an apocalyptic number.

1118421285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1118421285 is a deficient number, since it is larger than the sum of its proper divisors (697762971).

1118421285 is a wasteful number, since it uses less digits than its factorization.

1118421285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112932.

The product of its digits is 5120, while the sum is 33.

The square root of 1118421285 is about 33442.8061771138. The cubic root of 1118421285 is about 1038.0106463838.

Adding to 1118421285 its reverse (5821248111), we get a palindrome (6939669396).

The spelling of 1118421285 in words is "one billion, one hundred eighteen million, four hundred twenty-one thousand, two hundred eighty-five".