721496271 has 16 divisors (see below), whose sum is σ = 976068608. Its totient is φ = 474012000.

The previous prime is 721496239. The next prime is 721496273. The reversal of 721496271 is 172694127.

It is not a de Polignac number, because 721496271 - 2⁵ = 721496239 is a prime.

It is a super-3 number, since 3×721496271³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721496273) 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, 51261 + ... + 63801.

It is an arithmetic number, because the mean of its divisors is an integer number (61004288).

Almost surely, 2^721496271 is an apocalyptic number.

721496271 is a deficient number, since it is larger than the sum of its proper divisors (254572337).

721496271 is a wasteful number, since it uses less digits than its factorization.

721496271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12822.

The product of its digits is 42336, while the sum is 39.

The square root of 721496271 is about 26860.6826234927. The cubic root of 721496271 is about 896.9013897159.

The spelling of 721496271 in words is "seven hundred twenty-one million, four hundred ninety-six thousand, two hundred seventy-one".