1323520 has 80 divisors (see below), whose sum is σ = 3535488. Its totient is φ = 471040.

The previous prime is 1323503. The next prime is 1323529. The reversal of 1323520 is 253231.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1323494 and 1323503.

It is not an unprimeable number, because it can be changed into a prime (1323529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28137 + ... + 28183.

2^1323520 is an apocalyptic number.

1323520 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 1323520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1767744).

1323520 is an abundant number, since it is smaller than the sum of its proper divisors (2211968).

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

1323520 is an equidigital number, since it uses as much as digits as its factorization.

1323520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 1323520 is about 1150.4433927838. The cubic root of 1323520 is about 109.7935521754.

Adding to 1323520 its reverse (253231), we get a palindrome (1576751).

The spelling of 1323520 in words is "one million, three hundred twenty-three thousand, five hundred twenty".