4642021 has 4 divisors (see below), whose sum is σ = 4843872. Its totient is φ = 4440172.

The previous prime is 4642013. The next prime is 4642069. The reversal of 4642021 is 1202464.

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 4642021 - 2³ = 4642013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4642021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4642081) 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, 100891 + ... + 100936.

It is an arithmetic number, because the mean of its divisors is an integer number (1210968).

Almost surely, 2^4642021 is an apocalyptic number.

It is an amenable number.

4642021 is a deficient number, since it is larger than the sum of its proper divisors (201851).

4642021 is a wasteful number, since it uses less digits than its factorization.

4642021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201850.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 4642021 is about 2154.5349846313. The cubic root of 4642021 is about 166.8152306442.

Adding to 4642021 its reverse (1202464), we get a palindrome (5844485).

It can be divided in two parts, 464 and 2021, that added together give a triangular number (2485 = T₇₀).

The spelling of 4642021 in words is "four million, six hundred forty-two thousand, twenty-one".