1725445 has 4 divisors (see below), whose sum is σ = 2070540. Its totient is φ = 1380352.

The previous prime is 1725419. The next prime is 1725463. The reversal of 1725445 is 5445271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5445271 = 13 ⋅418867.

It can be written as a sum of positive squares in 2 ways, for example, as 519841 + 1205604 = 721^2 + 1098^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1725445 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172540 + ... + 172549.

It is an arithmetic number, because the mean of its divisors is an integer number (517635).

2^1725445 is an apocalyptic number.

It is an amenable number.

1725445 is a deficient number, since it is larger than the sum of its proper divisors (345095).

1725445 is an equidigital number, since it uses as much as digits as its factorization.

1725445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345094.

The product of its digits is 5600, while the sum is 28.

The square root of 1725445 is about 1313.5619513369. The cubic root of 1725445 is about 119.9408273079.

The spelling of 1725445 in words is "one million, seven hundred twenty-five thousand, four hundred forty-five".