725430 has 16 divisors (see below), whose sum is σ = 1741104. Its totient is φ = 193440.

The previous prime is 725423. The next prime is 725437. The reversal of 725430 is 34527.

It is a happy number.

725430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (725423) and next prime (725437).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 725397 and 725406.

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 725430.

It is not an unprimeable number, because it can be changed into a prime (725437) by changing a digit.

725430 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12061 + ... + 12120.

It is an arithmetic number, because the mean of its divisors is an integer number (108819).

2⁷²⁵⁴³⁰ is an apocalyptic number.

725430 is an abundant number, since it is smaller than the sum of its proper divisors (1015674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

725430 is a wasteful number, since it uses less digits than its factorization.

725430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24191.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 725430 is about 851.7217855615. The cubic root of 725430 is about 89.8528459474.

Adding to 725430 its reverse (34527), we get a palindrome (759957).

The spelling of 725430 in words is "seven hundred twenty-five thousand, four hundred thirty".