1325520 has 120 divisors (see below), whose sum is σ = 5106816. Its totient is φ = 301824.

The previous prime is 1325509. The next prime is 1325521. The reversal of 1325520 is 255231.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is an Ulam number.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 1325493 and 1325502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4909 + ... + 5171.

2^1325520 is an apocalyptic number.

1325520 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 1325520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2553408).

1325520 is an abundant number, since it is smaller than the sum of its proper divisors (3781296).

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

1325520 is a wasteful number, since it uses less digits than its factorization.

1325520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 1325520 is about 1151.3122947315. The cubic root of 1325520 is about 109.8488281540.

The spelling of 1325520 in words is "one million, three hundred twenty-five thousand, five hundred twenty".