1321018 has 4 divisors (see below), whose sum is σ = 1981530. Its totient is φ = 660508.

The previous prime is 1321007. The next prime is 1321031. The reversal of 1321018 is 8101231.

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., 1026169 + 294849 = 1013^2 + 543^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1320992 and 1321010.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330253 + ... + 330256.

2^1321018 is an apocalyptic number.

1321018 is a deficient number, since it is larger than the sum of its proper divisors (660512).

1321018 is an equidigital number, since it uses as much as digits as its factorization.

1321018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660511.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1321018 is about 1149.3554715579. The cubic root of 1321018 is about 109.7243234644.

Adding to 1321018 its reverse (8101231), we get a palindrome (9422249).

The spelling of 1321018 in words is "one million, three hundred twenty-one thousand, eighteen".