4218001 has 2 divisors, whose sum is σ = 4218002. Its totient is φ = 4218000.

The previous prime is 4217987. The next prime is 4218007. The reversal of 4218001 is 1008124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4198401 + 19600 = 2049^2 + 140^2 .

It is a cyclic number.

It is not a de Polignac number, because 4218001 - 2⁹ = 4217489 is a prime.

4218001 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4218007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2109000 + 2109001.

It is an arithmetic number, because the mean of its divisors is an integer number (2109001).

Almost surely, 2^4218001 is an apocalyptic number.

It is an amenable number.

4218001 is a deficient number, since it is larger than the sum of its proper divisors (1).

4218001 is an equidigital number, since it uses as much as digits as its factorization.

4218001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 4218001 is about 2053.7772517973. Note that the first 3 decimals coincide. The cubic root of 4218001 is about 161.5730386882.

The spelling of 4218001 in words is "four million, two hundred eighteen thousand, one".