1320668 has 6 divisors (see below), whose sum is σ = 2311176. Its totient is φ = 660332.

The previous prime is 1320667. The next prime is 1320721. The reversal of 1320668 is 8660231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165080 + ... + 165087.

It is an arithmetic number, because the mean of its divisors is an integer number (385196).

2^1320668 is an apocalyptic number.

It is an amenable number.

1320668 is a deficient number, since it is larger than the sum of its proper divisors (990508).

1320668 is a wasteful number, since it uses less digits than its factorization.

1320668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330171 (or 330169 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1320668 is about 1149.2032022232. The cubic root of 1320668 is about 109.7146322250.

Adding to 1320668 its reverse (8660231), we get a palindrome (9980899).

The spelling of 1320668 in words is "one million, three hundred twenty thousand, six hundred sixty-eight".