1323540 has 120 divisors (see below), whose sum is σ = 4472160. Its totient is φ = 326592.

The previous prime is 1323533. The next prime is 1323541. The reversal of 1323540 is 453231.

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

It is a d-powerful number, because it can be written as 1 + 3⁹ + 2³ + 3¹¹ + 5⁷ + 4¹⁰ + 0 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323541) 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 39 ways as a sum of consecutive naturals, for example, 30759 + ... + 30801.

It is an arithmetic number, because the mean of its divisors is an integer number (37268).

2^1323540 is an apocalyptic number.

1323540 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 1323540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2236080).

1323540 is an abundant number, since it is smaller than the sum of its proper divisors (3148620).

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

1323540 is a wasteful number, since it uses less digits than its factorization.

1323540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 1323540 is about 1150.4520850518. The cubic root of 1323540 is about 109.7941052107.

Adding to 1323540 its reverse (453231), we get a palindrome (1776771).

The spelling of 1323540 in words is "one million, three hundred twenty-three thousand, five hundred forty".