4255421 has 4 divisors (see below), whose sum is σ = 4325244. Its totient is φ = 4185600.

The previous prime is 4255403. The next prime is 4255429. The reversal of 4255421 is 1245524.

It is a happy number.

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 1466521 + 2788900 = 1211^2 + 1670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4255421 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 (4255429) 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, 34820 + ... + 34941.

It is an arithmetic number, because the mean of its divisors is an integer number (1081311).

Almost surely, 2^4255421 is an apocalyptic number.

It is an amenable number.

4255421 is a deficient number, since it is larger than the sum of its proper divisors (69823).

4255421 is an equidigital number, since it uses as much as digits as its factorization.

4255421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69822.

The product of its digits is 1600, while the sum is 23.

The square root of 4255421 is about 2062.8671794374. The cubic root of 4255421 is about 162.0494311381.

The spelling of 4255421 in words is "four million, two hundred fifty-five thousand, four hundred twenty-one".