721207 has 2 divisors, whose sum is σ = 721208. Its totient is φ = 721206.

The previous prime is 721199. The next prime is 721213. The reversal of 721207 is 702127.

It is a strong prime.

It is an emirp because it is prime and its reverse (702127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 721207 - 2³ = 721199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360603 + 360604.

It is an arithmetic number, because the mean of its divisors is an integer number (360604).

2⁷²¹²⁰⁷ is an apocalyptic number.

721207 is a deficient number, since it is larger than the sum of its proper divisors (1).

721207 is an equidigital number, since it uses as much as digits as its factorization.

721207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 721207 is about 849.2390711690. The cubic root of 721207 is about 89.6781508180.

It can be divided in two parts, 72120 and 7, that added together give a palindrome (72127).

The spelling of 721207 in words is "seven hundred twenty-one thousand, two hundred seven", and thus it is an iban number.