4318421 has 4 divisors (see below), whose sum is σ = 4326732. Its totient is φ = 4310112.

The previous prime is 4318409. The next prime is 4318429. The reversal of 4318421 is 1248134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1248134 = 2 ⋅624067.

It can be written as a sum of positive squares in 2 ways, for example, as 2656900 + 1661521 = 1630^2 + 1289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4318421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4318429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3320 + ... + 4433.

It is an arithmetic number, because the mean of its divisors is an integer number (1081683).

Almost surely, 2^4318421 is an apocalyptic number.

It is an amenable number.

4318421 is a deficient number, since it is larger than the sum of its proper divisors (8311).

4318421 is an equidigital number, since it uses as much as digits as its factorization.

4318421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8310.

The product of its digits is 768, while the sum is 23.

The square root of 4318421 is about 2078.0810860022. The cubic root of 4318421 is about 162.8452116822.

The spelling of 4318421 in words is "four million, three hundred eighteen thousand, four hundred twenty-one".