471721 has 2 divisors, whose sum is σ = 471722. Its totient is φ = 471720.

The previous prime is 471719. The next prime is 471749. The reversal of 471721 is 127174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 416025 + 55696 = 645^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 471721 - 2¹ = 471719 is a prime.

Together with 471719, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 471692 and 471701.

It is not a weakly prime, because it can be changed into another prime (471781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235860 + 235861.

It is an arithmetic number, because the mean of its divisors is an integer number (235861).

2⁴⁷¹⁷²¹ is an apocalyptic number.

It is an amenable number.

471721 is a deficient number, since it is larger than the sum of its proper divisors (1).

471721 is an equidigital number, since it uses as much as digits as its factorization.

471721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 392, while the sum is 22.

The square root of 471721 is about 686.8194813777. The cubic root of 471721 is about 77.8445842486.

Adding to 471721 its reverse (127174), we get a palindrome (598895).

The spelling of 471721 in words is "four hundred seventy-one thousand, seven hundred twenty-one", and thus it is an iban number.