1318905 has 48 divisors (see below), whose sum is σ = 2695680. Its totient is φ = 584064.

The previous prime is 1318903. The next prime is 1318913. The reversal of 1318905 is 5098131.

It is not a de Polignac number, because 1318905 - 2¹ = 1318903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1318901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16656 + ... + 16734.

It is an arithmetic number, because the mean of its divisors is an integer number (56160).

2^1318905 is an apocalyptic number.

1318905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1318905 is an abundant number, since it is smaller than the sum of its proper divisors (1376775).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1318905 is a wasteful number, since it uses less digits than its factorization.

1318905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1318905 is about 1148.4358928560. The cubic root of 1318905 is about 109.6657900151.

The spelling of 1318905 in words is "one million, three hundred eighteen thousand, nine hundred five".