1322660 has 24 divisors (see below), whose sum is σ = 2847096. Its totient is φ = 515840.

The previous prime is 1322641. The next prime is 1322669. The reversal of 1322660 is 662231.

It can be written as a sum of positive squares in 4 ways, for example, as 13924 + 1308736 = 118^2 + 1144^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1322669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14 + ... + 1626.

It is an arithmetic number, because the mean of its divisors is an integer number (118629).

2^1322660 is an apocalyptic number.

1322660 is a gapful number since it is divisible by the number (10) 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 1322660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1423548).

1322660 is an abundant number, since it is smaller than the sum of its proper divisors (1524436).

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

1322660 is a wasteful number, since it uses less digits than its factorization.

1322660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663 (or 1661 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1322660 is about 1150.0695631135. The cubic root of 1322660 is about 109.7697663836.

Adding to 1322660 its reverse (662231), we get a palindrome (1984891).

The spelling of 1322660 in words is "one million, three hundred twenty-two thousand, six hundred sixty".