4642421 has 4 divisors (see below), whose sum is σ = 5305632. Its totient is φ = 3979212.

The previous prime is 4642399. The next prime is 4642423. The reversal of 4642421 is 1242464.

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 4642421 - 2¹⁰ = 4641397 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 (4642423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331595 + ... + 331608.

It is an arithmetic number, because the mean of its divisors is an integer number (1326408).

Almost surely, 2^4642421 is an apocalyptic number.

It is an amenable number.

4642421 is a deficient number, since it is larger than the sum of its proper divisors (663211).

4642421 is an equidigital number, since it uses as much as digits as its factorization.

4642421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663210.

The product of its digits is 1536, while the sum is 23.

The square root of 4642421 is about 2154.6278100869. The cubic root of 4642421 is about 166.8200219608.

Adding to 4642421 its reverse (1242464), we get a palindrome (5884885).

The spelling of 4642421 in words is "four million, six hundred forty-two thousand, four hundred twenty-one".