1318356 has 60 divisors (see below), whose sum is σ = 3723412. Its totient is φ = 404352.

The previous prime is 1318349. The next prime is 1318379. The reversal of 1318356 is 6538131.

It can be written as a sum of positive squares in 2 ways, for example, as 72900 + 1245456 = 270^2 + 1116^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4056 + ... + 4368.

2^1318356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1318356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1861706).

1318356 is an abundant number, since it is smaller than the sum of its proper divisors (2405056).

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

1318356 is a wasteful number, since it uses less digits than its factorization.

1318356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 331 counting only the distinct ones).

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

The square root of 1318356 is about 1148.1968472348. The cubic root of 1318356 is about 109.6505716143.

1318356 divided by its sum of digits (27) gives a triangular number (48828 = T₃₁₂).

It can be divided in two parts, 131835 and 6, that added together give a triangular number (131841 = T₅₁₃).

The spelling of 1318356 in words is "one million, three hundred eighteen thousand, three hundred fifty-six".