1320818 has 4 divisors (see below), whose sum is σ = 1981230. Its totient is φ = 660408.

The previous prime is 1320811. The next prime is 1320859. The reversal of 1320818 is 8180231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1138489 + 182329 = 1067^2 + 427^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1320793 and 1320802.

It is not an unprimeable number, because it can be changed into a prime (1320811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330203 + ... + 330206.

2^1320818 is an apocalyptic number.

1320818 is a deficient number, since it is larger than the sum of its proper divisors (660412).

1320818 is an equidigital number, since it uses as much as digits as its factorization.

1320818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660411.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1320818 is about 1149.2684629798. The cubic root of 1320818 is about 109.7187858229.

The spelling of 1320818 in words is "one million, three hundred twenty thousand, eight hundred eighteen".