726142521 has 16 divisors (see below), whose sum is σ = 1043171136. Its totient is φ = 446640576.

The previous prime is 726142511. The next prime is 726142523. The reversal of 726142521 is 125241627.

It is not a de Polignac number, because 726142521 - 2¹¹ = 726140473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (726142523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122011 + ... + 127823.

It is an arithmetic number, because the mean of its divisors is an integer number (65198196).

Almost surely, 2^726142521 is an apocalyptic number.

It is an amenable number.

726142521 is a deficient number, since it is larger than the sum of its proper divisors (317028615).

726142521 is a wasteful number, since it uses less digits than its factorization.

726142521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9032.

The product of its digits is 6720, while the sum is 30.

The square root of 726142521 is about 26947.0317660406. The cubic root of 726142521 is about 898.8225429377.

The spelling of 726142521 in words is "seven hundred twenty-six million, one hundred forty-two thousand, five hundred twenty-one".