726387 has 4 divisors (see below), whose sum is σ = 968520. Its totient is φ = 484256.

The previous prime is 726379. The next prime is 726391. The reversal of 726387 is 783627.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 726387 - 2³ = 726379 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (726307) 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 in 3 ways as a sum of consecutive naturals, for example, 121062 + ... + 121067.

It is an arithmetic number, because the mean of its divisors is an integer number (242130).

2⁷²⁶³⁸⁷ is an apocalyptic number.

726387 is a deficient number, since it is larger than the sum of its proper divisors (242133).

726387 is a wasteful number, since it uses less digits than its factorization.

726387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242132.

The product of its digits is 14112, while the sum is 33.

The square root of 726387 is about 852.2834035695. The cubic root of 726387 is about 89.8923404028.

The spelling of 726387 in words is "seven hundred twenty-six thousand, three hundred eighty-seven".