1321968 has 20 divisors (see below), whose sum is σ = 3415208. Its totient is φ = 440640.

The previous prime is 1321961. The next prime is 1321981. The reversal of 1321968 is 8691231.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13723 + ... + 13818.

2^1321968 is an apocalyptic number.

It is an amenable number.

1321968 is an abundant number, since it is smaller than the sum of its proper divisors (2093240).

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

1321968 is a wasteful number, since it uses less digits than its factorization.

1321968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27552 (or 27546 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 1321968 is about 1149.7686723859. The cubic root of 1321968 is about 109.7506196314.

The spelling of 1321968 in words is "one million, three hundred twenty-one thousand, nine hundred sixty-eight".