1218736 has 30 divisors (see below), whose sum is σ = 2503932. Its totient is φ = 574560.

The previous prime is 1218731. The next prime is 1218739. The reversal of 1218736 is 6378121.

1218736 is nontrivially palindromic in base 15.

It is not an unprimeable number, because it can be changed into a prime (1218731) 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, 5671 + ... + 5881.

2^1218736 is an apocalyptic number.

1218736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251966).

1218736 is an abundant number, since it is smaller than the sum of its proper divisors (1285196).

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

1218736 is a wasteful number, since it uses less digits than its factorization.

1218736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 232 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 1218736 is about 1103.9637675214. The cubic root of 1218736 is about 106.8160580342.

The spelling of 1218736 in words is "one million, two hundred eighteen thousand, seven hundred thirty-six".