42420022 has 4 divisors (see below), whose sum is σ = 63630036. Its totient is φ = 21210010.

The previous prime is 42420017. The next prime is 42420031. The reversal of 42420022 is 22002424.

42420022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 42419978 and 42420005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605004 + ... + 10605007.

It is an arithmetic number, because the mean of its divisors is an integer number (15907509).

Almost surely, 2^42420022 is an apocalyptic number.

42420022 is a deficient number, since it is larger than the sum of its proper divisors (21210014).

42420022 is a wasteful number, since it uses less digits than its factorization.

42420022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21210013.

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 42420022 is about 6513.0654840866. The cubic root of 42420022 is about 348.7575593913.

Adding to 42420022 its reverse (22002424), we get a palindrome (64422446).

The spelling of 42420022 in words is "forty-two million, four hundred twenty thousand, twenty-two".