4243621 has 8 divisors (see below), whose sum is σ = 4404224. Its totient is φ = 4084560.

The previous prime is 4243619. The next prime is 4243633. The reversal of 4243621 is 1263424.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4243621 - 2¹ = 4243619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4243592 and 4243601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11191 + ... + 11563.

It is an arithmetic number, because the mean of its divisors is an integer number (550528).

Almost surely, 2^4243621 is an apocalyptic number.

It is an amenable number.

4243621 is a deficient number, since it is larger than the sum of its proper divisors (160603).

4243621 is a wasteful number, since it uses less digits than its factorization.

4243621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771.

The product of its digits is 1152, while the sum is 22.

The square root of 4243621 is about 2060.0050970811. The cubic root of 4243621 is about 161.8995083716.

The spelling of 4243621 in words is "four million, two hundred forty-three thousand, six hundred twenty-one".