725165 has 8 divisors (see below), whose sum is σ = 994560. Its totient is φ = 497232.

The previous prime is 725161. The next prime is 725189. The reversal of 725165 is 561527.

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 725165 - 2² = 725161 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 725165.

It is not an unprimeable number, because it can be changed into a prime (725161) 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, 10325 + ... + 10394.

It is an arithmetic number, because the mean of its divisors is an integer number (124320).

2⁷²⁵¹⁶⁵ is an apocalyptic number.

It is an amenable number.

725165 is a deficient number, since it is larger than the sum of its proper divisors (269395).

725165 is a wasteful number, since it uses less digits than its factorization.

725165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20731.

The product of its digits is 2100, while the sum is 26.

The square root of 725165 is about 851.5662041204. The cubic root of 725165 is about 89.8419035159.

The spelling of 725165 in words is "seven hundred twenty-five thousand, one hundred sixty-five".