4318021 has 4 divisors (see below), whose sum is σ = 4457344. Its totient is φ = 4178700.

The previous prime is 4317991. The next prime is 4318049. The reversal of 4318021 is 1208134.

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.

It is a cyclic number.

It is not a de Polignac number, because 4318021 - 2⁷ = 4317893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4318021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4318081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69615 + ... + 69676.

It is an arithmetic number, because the mean of its divisors is an integer number (1114336).

Almost surely, 2^4318021 is an apocalyptic number.

It is an amenable number.

4318021 is a deficient number, since it is larger than the sum of its proper divisors (139323).

4318021 is a wasteful number, since it uses less digits than its factorization.

4318021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139322.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 4318021 is about 2077.9848411382. The cubic root of 4318021 is about 162.8401836024.

The spelling of 4318021 in words is "four million, three hundred eighteen thousand, twenty-one".