725423 has 2 divisors, whose sum is σ = 725424. Its totient is φ = 725422.

The previous prime is 725399. The next prime is 725437. The reversal of 725423 is 324527.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 725423 - 2⁶ = 725359 is a prime.

It is a Sophie Germain prime.

It is an Ulam 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 725423.

It is not a weakly prime, because it can be changed into another prime (725323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362711 + 362712.

It is an arithmetic number, because the mean of its divisors is an integer number (362712).

2⁷²⁵⁴²³ is an apocalyptic number.

725423 is a deficient number, since it is larger than the sum of its proper divisors (1).

725423 is an equidigital number, since it uses as much as digits as its factorization.

725423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 23.

The square root of 725423 is about 851.7176762285. The cubic root of 725423 is about 89.8525569363.

The spelling of 725423 in words is "seven hundred twenty-five thousand, four hundred twenty-three".