726261601 has 8 divisors (see below), whose sum is σ = 790192424. Its totient is φ = 663482880.

The previous prime is 726261563. The next prime is 726261617. The reversal of 726261601 is 106162627.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 767376 + 725494225 = 876^2 + 26935^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 726261601 - 2⁹ = 726261089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726261691) 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, 286710 + ... + 289231.

It is an arithmetic number, because the mean of its divisors is an integer number (98774053).

Almost surely, 2^726261601 is an apocalyptic number.

It is an amenable number.

726261601 is a deficient number, since it is larger than the sum of its proper divisors (63930823).

726261601 is a wasteful number, since it uses less digits than its factorization.

726261601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576051.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 726261601 is about 26949.2411952545. The cubic root of 726261601 is about 898.8716728422.

The spelling of 726261601 in words is "seven hundred twenty-six million, two hundred sixty-one thousand, six hundred one".