720071 has 8 divisors (see below), whose sum is σ = 793488. Its totient is φ = 653400.

The previous prime is 720059. The next prime is 720089. The reversal of 720071 is 170027.

It is a happy number.

It is not a de Polignac number, because 720071 - 2⁶ = 720007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720091) 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 7 ways as a sum of consecutive naturals, for example, 1061 + ... + 1601.

It is an arithmetic number, because the mean of its divisors is an integer number (99186).

2⁷²⁰⁰⁷¹ is an apocalyptic number.

720071 is a deficient number, since it is larger than the sum of its proper divisors (73417).

720071 is an equidigital number, since it uses as much as digits as its factorization.

720071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 17.

The square root of 720071 is about 848.5699735437. The cubic root of 720071 is about 89.6310409430.

Adding to 720071 its reverse (170027), we get a palindrome (890098).

The spelling of 720071 in words is "seven hundred twenty thousand, seventy-one", and thus it is an iban number.