4505421 has 4 divisors (see below), whose sum is σ = 6007232. Its totient is φ = 3003612.

The previous prime is 4505419. The next prime is 4505437. The reversal of 4505421 is 1245054.

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 not a de Polignac number, because 4505421 - 2¹ = 4505419 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4505491) 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, 750901 + ... + 750906.

It is an arithmetic number, because the mean of its divisors is an integer number (1501808).

Almost surely, 2^4505421 is an apocalyptic number.

It is an amenable number.

4505421 is a deficient number, since it is larger than the sum of its proper divisors (1501811).

4505421 is a wasteful number, since it uses less digits than its factorization.

4505421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501810.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 4505421 is about 2122.5977009316. The cubic root of 4505421 is about 165.1626312028.

The spelling of 4505421 in words is "four million, five hundred five thousand, four hundred twenty-one".