4241821 has 8 divisors (see below), whose sum is σ = 4530240. Its totient is φ = 3962112.

The previous prime is 4241813. The next prime is 4241827. The reversal of 4241821 is 1281424.

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

It is a cyclic number.

It is not a de Polignac number, because 4241821 - 2³ = 4241813 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4241792 and 4241801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4241827) 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 7 ways as a sum of consecutive naturals, for example, 1156 + ... + 3133.

It is an arithmetic number, because the mean of its divisors is an integer number (566280).

Almost surely, 2^4241821 is an apocalyptic number.

It is an amenable number.

4241821 is a deficient number, since it is larger than the sum of its proper divisors (288419).

4241821 is a wasteful number, since it uses less digits than its factorization.

4241821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4355.

The product of its digits is 512, while the sum is 22.

The square root of 4241821 is about 2059.5681586197. The cubic root of 4241821 is about 161.8766143755.

The spelling of 4241821 in words is "four million, two hundred forty-one thousand, eight hundred twenty-one".