725171 has 4 divisors (see below), whose sum is σ = 733992. Its totient is φ = 716352.

The previous prime is 725161. The next prime is 725189. The reversal of 725171 is 171527.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 171527 = 43 ⋅3989.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725171 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 725171.

It is not an unprimeable number, because it can be changed into a prime (725111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4286 + ... + 4451.

It is an arithmetic number, because the mean of its divisors is an integer number (183498).

2⁷²⁵¹⁷¹ is an apocalyptic number.

725171 is a deficient number, since it is larger than the sum of its proper divisors (8821).

725171 is an equidigital number, since it uses as much as digits as its factorization.

725171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820.

The product of its digits is 490, while the sum is 23.

The square root of 725171 is about 851.5697270336. The cubic root of 725171 is about 89.8421512986.

Adding to 725171 its reverse (171527), we get a palindrome (896698).

The spelling of 725171 in words is "seven hundred twenty-five thousand, one hundred seventy-one".