1725521 has 8 divisors (see below), whose sum is σ = 2009664. Its totient is φ = 1450800.

The previous prime is 1725509. The next prime is 1725527. The reversal of 1725521 is 1255271.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1725521 - 2¹⁴ = 1709137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1725527) 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, 1955 + ... + 2696.

It is an arithmetic number, because the mean of its divisors is an integer number (251208).

2^1725521 is an apocalyptic number.

It is an amenable number.

1725521 is a deficient number, since it is larger than the sum of its proper divisors (284143).

1725521 is an equidigital number, since it uses as much as digits as its factorization.

1725521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4711.

The product of its digits is 700, while the sum is 23.

The square root of 1725521 is about 1313.5908799927. The cubic root of 1725521 is about 119.9425882776.

The spelling of 1725521 in words is "one million, seven hundred twenty-five thousand, five hundred twenty-one".