4218971 has 2 divisors, whose sum is σ = 4218972. Its totient is φ = 4218970.

The previous prime is 4218967. The next prime is 4218979. The reversal of 4218971 is 1798124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4218971 - 2² = 4218967 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (4218979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2109485 + 2109486.

It is an arithmetic number, because the mean of its divisors is an integer number (2109486).

Almost surely, 2^4218971 is an apocalyptic number.

4218971 is a deficient number, since it is larger than the sum of its proper divisors (1).

4218971 is an equidigital number, since it uses as much as digits as its factorization.

4218971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 4218971 is about 2054.0133884666. The cubic root of 4218971 is about 161.5854232146.

The spelling of 4218971 in words is "four million, two hundred eighteen thousand, nine hundred seventy-one".