725999 has 2 divisors, whose sum is σ = 726000. Its totient is φ = 725998.

The previous prime is 725993. The next prime is 726007. The reversal of 725999 is 999527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 725999 - 2⁴ = 725983 is a prime.

It is a Chen prime.

725999 is a modest number, since divided by 999 gives 725 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362999 + 363000.

It is an arithmetic number, because the mean of its divisors is an integer number (363000).

2⁷²⁵⁹⁹⁹ is an apocalyptic number.

725999 is a deficient number, since it is larger than the sum of its proper divisors (1).

725999 is an equidigital number, since it uses as much as digits as its factorization.

725999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 41.

The square root of 725999 is about 852.0557493498. The cubic root of 725999 is about 89.8763322052.

The spelling of 725999 in words is "seven hundred twenty-five thousand, nine hundred ninety-nine".