4500421 has 4 divisors (see below), whose sum is σ = 4622092. Its totient is φ = 4378752.

The previous prime is 4500409. The next prime is 4500439. The reversal of 4500421 is 1240054.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4264225 + 236196 = 2065^2 + 486^2 .

It is a cyclic number.

It is not a de Polignac number, because 4500421 - 2¹⁷ = 4369349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4500395 and 4500404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4500401) 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, 60780 + ... + 60853.

It is an arithmetic number, because the mean of its divisors is an integer number (1155523).

Almost surely, 2^4500421 is an apocalyptic number.

It is an amenable number.

4500421 is a deficient number, since it is larger than the sum of its proper divisors (121671).

4500421 is a wasteful number, since it uses less digits than its factorization.

4500421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121670.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 4500421 is about 2121.4195718905. The cubic root of 4500421 is about 165.1015108448.

Adding to 4500421 its reverse (1240054), we get a palindrome (5740475).

The spelling of 4500421 in words is "four million, five hundred thousand, four hundred twenty-one".