4255621 has 4 divisors (see below), whose sum is σ = 4440672. Its totient is φ = 4070572.

The previous prime is 4255619. The next prime is 4255637. The reversal of 4255621 is 1265524.

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 not a de Polignac number, because 4255621 - 2¹ = 4255619 is a prime.

It is a super-2 number, since 2×4255621² = 36220620191282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4255921) 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, 92491 + ... + 92536.

It is an arithmetic number, because the mean of its divisors is an integer number (1110168).

Almost surely, 2^4255621 is an apocalyptic number.

It is an amenable number.

4255621 is a deficient number, since it is larger than the sum of its proper divisors (185051).

4255621 is a wasteful number, since it uses less digits than its factorization.

4255621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185050.

The product of its digits is 2400, while the sum is 25.

The square root of 4255621 is about 2062.9156550863. The cubic root of 4255621 is about 162.0519698120.

The spelling of 4255621 in words is "four million, two hundred fifty-five thousand, six hundred twenty-one".