1316538 has 12 divisors (see below), whose sum is σ = 2852538. Its totient is φ = 438840.

The previous prime is 1316537. The next prime is 1316591. The reversal of 1316538 is 8356131.

1316538 is a `hidden beast` number, since 1 + 3 + 1 + 653 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 915849 + 400689 = 957^2 + 633^2 .

It is not an unprimeable number, because it can be changed into a prime (1316533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36553 + ... + 36588.

2^1316538 is an apocalyptic number.

1316538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1316538 is an abundant number, since it is smaller than the sum of its proper divisors (1536000).

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

1316538 is a wasteful number, since it uses less digits than its factorization.

1316538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73149 (or 73146 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1316538 is about 1147.4048980199. The cubic root of 1316538 is about 109.6001460740.

It can be divided in two parts, 13165 and 38, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 1316538 in words is "one million, three hundred sixteen thousand, five hundred thirty-eight".