4942021 has 4 divisors (see below), whose sum is σ = 5648032. Its totient is φ = 4236012.

The previous prime is 4942013. The next prime is 4942039. The reversal of 4942021 is 1202494.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1202494 = 2 ⋅601247.

It is a cyclic number.

It is not a de Polignac number, because 4942021 - 2³ = 4942013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4941983 and 4942001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4942061) 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, 352995 + ... + 353008.

It is an arithmetic number, because the mean of its divisors is an integer number (1412008).

Almost surely, 2^4942021 is an apocalyptic number.

It is an amenable number.

4942021 is a deficient number, since it is larger than the sum of its proper divisors (706011).

4942021 is an equidigital number, since it uses as much as digits as its factorization.

4942021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706010.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 4942021 is about 2223.0656760429. The cubic root of 4942021 is about 170.3340720256.

The spelling of 4942021 in words is "four million, nine hundred forty-two thousand, twenty-one".