4225621 has 4 divisors (see below), whose sum is σ = 4241952. Its totient is φ = 4209292.

The previous prime is 4225609. The next prime is 4225633. The reversal of 4225621 is 1265224.

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 an interprime number because it is at equal distance from previous prime (4225609) and next prime (4225633).

It is a cyclic number.

It is not a de Polignac number, because 4225621 - 2⁵ = 4225589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4225592 and 4225601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4225651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7771 + ... + 8296.

It is an arithmetic number, because the mean of its divisors is an integer number (1060488).

Almost surely, 2^4225621 is an apocalyptic number.

It is an amenable number.

4225621 is a deficient number, since it is larger than the sum of its proper divisors (16331).

4225621 is a wasteful number, since it uses less digits than its factorization.

4225621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16330.

The product of its digits is 960, while the sum is 22.

The square root of 4225621 is about 2055.6315331304. The cubic root of 4225621 is about 161.6702763687.

It can be divided in two parts, 4 and 225621, that added together give a square (225625 = 475²).

The spelling of 4225621 in words is "four million, two hundred twenty-five thousand, six hundred twenty-one".