725501 has 4 divisors (see below), whose sum is σ = 829152. Its totient is φ = 621852.

The previous prime is 725479. The next prime is 725507. The reversal of 725501 is 105527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 725501 - 2⁶ = 725437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 7.

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 725501.

It is not an unprimeable number, because it can be changed into a prime (725507) 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, 51815 + ... + 51828.

It is an arithmetic number, because the mean of its divisors is an integer number (207288).

2⁷²⁵⁵⁰¹ is an apocalyptic number.

It is an amenable number.

725501 is a deficient number, since it is larger than the sum of its proper divisors (103651).

725501 is a wasteful number, since it uses less digits than its factorization.

725501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103650.

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 725501 is about 851.7634648187. The cubic root of 725501 is about 89.8557772405.

The spelling of 725501 in words is "seven hundred twenty-five thousand, five hundred one".