725541 has 4 divisors (see below), whose sum is σ = 967392. Its totient is φ = 483692.

The previous prime is 725537. The next prime is 725579. The reversal of 725541 is 145527.

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 a cyclic number.

It is not a de Polignac number, because 725541 - 2² = 725537 is a prime.

It is a D-number.

It is a Curzon number.

725541 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725531) 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, 120921 + ... + 120926.

It is an arithmetic number, because the mean of its divisors is an integer number (241848).

2⁷²⁵⁵⁴¹ is an apocalyptic number.

It is an amenable number.

725541 is a deficient number, since it is larger than the sum of its proper divisors (241851).

725541 is a wasteful number, since it uses less digits than its factorization.

725541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241850.

The product of its digits is 1400, while the sum is 24.

The square root of 725541 is about 851.7869451923. The cubic root of 725541 is about 89.8574285891.

The spelling of 725541 in words is "seven hundred twenty-five thousand, five hundred forty-one".