1321308 has 54 divisors (see below), whose sum is σ = 3575936. Its totient is φ = 411264.

The previous prime is 1321303. The next prime is 1321319. The reversal of 1321308 is 8031231.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321301) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10341 + ... + 10467.

2^1321308 is an apocalyptic number.

1321308 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1787968).

1321308 is an abundant number, since it is smaller than the sum of its proper divisors (2254628).

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

1321308 is a wasteful number, since it uses less digits than its factorization.

1321308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1321308 is about 1149.4816222976. The cubic root of 1321308 is about 109.7323520519.

Adding to 1321308 its reverse (8031231), we get a palindrome (9352539).

It can be divided in two parts, 13 and 21308, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 1321308 in words is "one million, three hundred twenty-one thousand, three hundred eight".