4142857217 has 4 divisors (see below), whose sum is σ = 4142986176. Its totient is φ = 4142728260.

The previous prime is 4142857207. The next prime is 4142857241. The reversal of 4142857217 is 7127582414.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7127582414 = 2 ⋅3563791207.

It is a cyclic number.

It is not a de Polignac number, because 4142857217 - 2⁸ = 4142856961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4142857207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26492 + ... + 94802.

It is an arithmetic number, because the mean of its divisors is an integer number (1035746544).

Almost surely, 2^4142857217 is an apocalyptic number.

It is an amenable number.

4142857217 is a deficient number, since it is larger than the sum of its proper divisors (128959).

4142857217 is an equidigital number, since it uses as much as digits as its factorization.

4142857217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128958.

The product of its digits is 125440, while the sum is 41.

The square root of 4142857217 is about 64365.0310106350. The cubic root of 4142857217 is about 1606.0780814714.

The spelling of 4142857217 in words is "four billion, one hundred forty-two million, eight hundred fifty-seven thousand, two hundred seventeen".