4218901 has 2 divisors, whose sum is σ = 4218902. Its totient is φ = 4218900.

The previous prime is 4218899. The next prime is 4218917. The reversal of 4218901 is 1098124.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2643876 + 1575025 = 1626^2 + 1255^2 .

It is a cyclic number.

It is not a de Polignac number, because 4218901 - 2¹ = 4218899 is a prime.

Together with 4218899, it forms a pair of twin primes.

4218901 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4218961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2109450 + 2109451.

It is an arithmetic number, because the mean of its divisors is an integer number (2109451).

Almost surely, 2^4218901 is an apocalyptic number.

It is an amenable number.

4218901 is a deficient number, since it is larger than the sum of its proper divisors (1).

4218901 is an equidigital number, since it uses as much as digits as its factorization.

4218901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 4218901 is about 2053.9963485849. The cubic root of 4218901 is about 161.5845295495.

The spelling of 4218901 in words is "four million, two hundred eighteen thousand, nine hundred one".