4455421 has 4 divisors (see below), whose sum is σ = 4459644. Its totient is φ = 4451200.

The previous prime is 4455403. The next prime is 4455461. The reversal of 4455421 is 1245544.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3189796 + 1265625 = 1786^2 + 1125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4455421 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 (4455461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011 + ... + 3151.

It is an arithmetic number, because the mean of its divisors is an integer number (1114911).

Almost surely, 2^4455421 is an apocalyptic number.

It is an amenable number.

4455421 is a deficient number, since it is larger than the sum of its proper divisors (4223).

4455421 is a wasteful number, since it uses less digits than its factorization.

4455421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4222.

The product of its digits is 3200, while the sum is 25.

The square root of 4455421 is about 2110.7868201218. The cubic root of 4455421 is about 164.5493795827.

The spelling of 4455421 in words is "four million, four hundred fifty-five thousand, four hundred twenty-one".