726242539 has 16 divisors (see below), whose sum is σ = 801561600. Its totient is φ = 652520160.

The previous prime is 726242537. The next prime is 726242557. The reversal of 726242539 is 935242627.

It is a cyclic number.

It is not a de Polignac number, because 726242539 - 2¹ = 726242537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726242537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364504 + ... + 366490.

It is an arithmetic number, because the mean of its divisors is an integer number (50097600).

Almost surely, 2^726242539 is an apocalyptic number.

726242539 is a deficient number, since it is larger than the sum of its proper divisors (75319061).

726242539 is a wasteful number, since it uses less digits than its factorization.

726242539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370.

The product of its digits is 181440, while the sum is 40.

The square root of 726242539 is about 26948.8875280595. The cubic root of 726242539 is about 898.8638086228.

The spelling of 726242539 in words is "seven hundred twenty-six million, two hundred forty-two thousand, five hundred thirty-nine".