1723265 has 4 divisors (see below), whose sum is σ = 2067924. Its totient is φ = 1378608.

The previous prime is 1723247. The next prime is 1723277. The reversal of 1723265 is 5623271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5623271 = 71 ⋅79201.

It can be written as a sum of positive squares in 2 ways, for example, as 1181569 + 541696 = 1087^2 + 736^2 .

It is a cyclic number.

It is not a de Polignac number, because 1723265 - 2¹⁰ = 1722241 is a prime.

It is a Duffinian 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, 172322 + ... + 172331.

It is an arithmetic number, because the mean of its divisors is an integer number (516981).

2^1723265 is an apocalyptic number.

It is an amenable number.

1723265 is a deficient number, since it is larger than the sum of its proper divisors (344659).

1723265 is an equidigital number, since it uses as much as digits as its factorization.

1723265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344658.

The product of its digits is 2520, while the sum is 26.

The square root of 1723265 is about 1312.7318842780. The cubic root of 1723265 is about 119.8902932527.

The spelling of 1723265 in words is "one million, seven hundred twenty-three thousand, two hundred sixty-five".