402217 has 4 divisors (see below), whose sum is σ = 409860. Its totient is φ = 394576.

The previous prime is 402197. The next prime is 402221. The reversal of 402217 is 712204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 114921 + 287296 = 339^2 + 536^2 .

It is a cyclic number.

It is not a de Polignac number, because 402217 - 2⁷ = 402089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402217.

It is not an unprimeable number, because it can be changed into a prime (402277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3742 + ... + 3847.

It is an arithmetic number, because the mean of its divisors is an integer number (102465).

2⁴⁰²²¹⁷ is an apocalyptic number.

It is an amenable number.

402217 is a deficient number, since it is larger than the sum of its proper divisors (7643).

402217 is an equidigital number, since it uses as much as digits as its factorization.

402217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7642.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 402217 is about 634.2058025594. The cubic root of 402217 is about 73.8165042173.

The spelling of 402217 in words is "four hundred two thousand, two hundred seventeen", and thus it is an iban number.