726405 has 16 divisors (see below), whose sum is σ = 1178880. Its totient is φ = 381888.

The previous prime is 726391. The next prime is 726413. The reversal of 726405 is 504627.

It is a happy number.

It is not a de Polignac number, because 726405 - 2⁸ = 726149 is a prime.

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 726405.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 879 + ... + 1491.

It is an arithmetic number, because the mean of its divisors is an integer number (73680).

2⁷²⁶⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

726405 is a deficient number, since it is larger than the sum of its proper divisors (452475).

726405 is a wasteful number, since it uses less digits than its factorization.

726405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 726405 is about 852.2939633718. The cubic root of 726405 is about 89.8930829128.

The spelling of 726405 in words is "seven hundred twenty-six thousand, four hundred five".