4645421 has 4 divisors (see below), whose sum is σ = 5067744. Its totient is φ = 4223100.

The previous prime is 4645411. The next prime is 4645429. The reversal of 4645421 is 1245464.

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 a de Polignac number, because none of the positive numbers 2^k-4645421 is a prime.

It is an Ulam 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 (4645429) 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, 211145 + ... + 211166.

It is an arithmetic number, because the mean of its divisors is an integer number (1266936).

Almost surely, 2^4645421 is an apocalyptic number.

It is an amenable number.

4645421 is a deficient number, since it is larger than the sum of its proper divisors (422323).

4645421 is a wasteful number, since it uses less digits than its factorization.

4645421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422322.

The product of its digits is 3840, while the sum is 26.

The square root of 4645421 is about 2155.3238735745. The cubic root of 4645421 is about 166.8559480650.

It can be divided in two parts, 464 and 5421, that added together give a palindrome (5885).

The spelling of 4645421 in words is "four million, six hundred forty-five thousand, four hundred twenty-one".