1322520 has 64 divisors (see below), whose sum is σ = 4043520. Its totient is φ = 345984.

The previous prime is 1322507. The next prime is 1322521. The reversal of 1322520 is 252231.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1322520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12307 + ... + 12413.

It is an arithmetic number, because the mean of its divisors is an integer number (63180).

2^1322520 is an apocalyptic number.

1322520 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 1322520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2021760).

1322520 is an abundant number, since it is smaller than the sum of its proper divisors (2721000).

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

1322520 is a wasteful number, since it uses less digits than its factorization.

1322520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 1322520 is about 1150.0086956193. The cubic root of 1322520 is about 109.7658933022.

Adding to 1322520 its reverse (252231), we get a palindrome (1574751).

The spelling of 1322520 in words is "one million, three hundred twenty-two thousand, five hundred twenty".