421717 has 2 divisors, whose sum is σ = 421718. Its totient is φ = 421716.

The previous prime is 421711. The next prime is 421727. The reversal of 421717 is 717124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 361201 + 60516 = 601^2 + 246^2 .

It is a cyclic number.

It is not a de Polignac number, because 421717 - 2³ = 421709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210858 + 210859.

It is an arithmetic number, because the mean of its divisors is an integer number (210859).

2⁴²¹⁷¹⁷ is an apocalyptic number.

It is an amenable number.

421717 is a deficient number, since it is larger than the sum of its proper divisors (1).

421717 is an equidigital number, since it uses as much as digits as its factorization.

421717 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 421717 is about 649.3974129915. The cubic root of 421717 is about 74.9906358679.

It can be divided in two parts, 4 and 21717, that multiplied together give a palindrome (86868).

The spelling of 421717 in words is "four hundred twenty-one thousand, seven hundred seventeen", and thus it is an iban number.