726531265 has 8 divisors (see below), whose sum is σ = 874177128. Its totient is φ = 579665280.

The previous prime is 726531257. The next prime is 726531269. The reversal of 726531265 is 562135627.

It can be written as a sum of positive squares in 4 ways, for example, as 236882881 + 489648384 = 15391^2 + 22128^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 726531265 - 2³ = 726531257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726531269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192916 + ... + 196645.

It is an arithmetic number, because the mean of its divisors is an integer number (109272141).

Almost surely, 2^726531265 is an apocalyptic number.

It is an amenable number.

726531265 is a deficient number, since it is larger than the sum of its proper divisors (147645863).

726531265 is a wasteful number, since it uses less digits than its factorization.

726531265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389939.

The product of its digits is 75600, while the sum is 37.

The square root of 726531265 is about 26954.2439144562. The cubic root of 726531265 is about 898.9829106919.

The spelling of 726531265 in words is "seven hundred twenty-six million, five hundred thirty-one thousand, two hundred sixty-five".