42322021 has 4 divisors (see below), whose sum is σ = 48368032. Its totient is φ = 36276012.

The previous prime is 42321997. The next prime is 42322067. The reversal of 42322021 is 12022324.

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 a de Polignac number, because none of the positive numbers 2^k-42322021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42321986 and 42322004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42325021) 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, 3022995 + ... + 3023008.

It is an arithmetic number, because the mean of its divisors is an integer number (12092008).

Almost surely, 2^42322021 is an apocalyptic number.

It is an amenable number.

42322021 is a deficient number, since it is larger than the sum of its proper divisors (6046011).

42322021 is an equidigital number, since it uses as much as digits as its factorization.

42322021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6046010.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 42322021 is about 6505.5377179754. The cubic root of 42322021 is about 348.4887795227.

Adding to 42322021 its reverse (12022324), we get a palindrome (54344345).

The spelling of 42322021 in words is "forty-two million, three hundred twenty-two thousand, twenty-one".