4217381 has 6 divisors (see below), whose sum is σ = 4905990. Its totient is φ = 3614856.

The previous prime is 4217363. The next prime is 4217387. The reversal of 4217381 is 1837124.

It can be written as a sum of positive squares in only one way, i.e., 3389281 + 828100 = 1841^2 + 910^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4217381 is a prime.

It is a super-2 number, since 2×4217381² = 35572604998322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4217381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4217387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42986 + ... + 43083.

It is an arithmetic number, because the mean of its divisors is an integer number (817665).

Almost surely, 2^4217381 is an apocalyptic number.

It is an amenable number.

4217381 is a deficient number, since it is larger than the sum of its proper divisors (688609).

4217381 is an equidigital number, since it uses as much as digits as its factorization.

4217381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86083 (or 86076 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 4217381 is about 2053.6263048569. The cubic root of 4217381 is about 161.5651218106.

The spelling of 4217381 in words is "four million, two hundred seventeen thousand, three hundred eighty-one".