1321608 has 32 divisors (see below), whose sum is σ = 3369600. Its totient is φ = 431808.

The previous prime is 1321601. The next prime is 1321627. The reversal of 1321608 is 8061231.

1321608 is nontrivially palindromic in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 753 + ... + 1791.

It is an arithmetic number, because the mean of its divisors is an integer number (105300).

2^1321608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1684800).

1321608 is an abundant number, since it is smaller than the sum of its proper divisors (2047992).

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

1321608 is a wasteful number, since it uses less digits than its factorization.

1321608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1321608 is about 1149.6121084957. The cubic root of 1321608 is about 109.7406562511.

Adding to 1321608 its reverse (8061231), we get a palindrome (9382839).

The spelling of 1321608 in words is "one million, three hundred twenty-one thousand, six hundred eight".