726058021 has 32 divisors (see below), whose sum is σ = 821882880. Its totient is φ = 637136064.

The previous prime is 726058013. The next prime is 726058031. The reversal of 726058021 is 120850627.

It is a cyclic number.

It is not a de Polignac number, because 726058021 - 2³ = 726058013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726058031) 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 31 ways as a sum of consecutive naturals, for example, 5223370 + ... + 5223508.

It is an arithmetic number, because the mean of its divisors is an integer number (25683840).

Almost surely, 2^726058021 is an apocalyptic number.

It is an amenable number.

726058021 is a deficient number, since it is larger than the sum of its proper divisors (95824859).

726058021 is a wasteful number, since it uses less digits than its factorization.

726058021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 726058021 is about 26945.4638297432. The cubic root of 726058021 is about 898.7876767560.

The spelling of 726058021 in words is "seven hundred twenty-six million, fifty-eight thousand, twenty-one".