210420042 has 32 divisors (see below), whose sum is σ = 482265600. Its totient is φ = 59956848.

The previous prime is 210420037. The next prime is 210420053. The reversal of 210420042 is 240024012.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9309 + ... + 22527.

It is an arithmetic number, because the mean of its divisors is an integer number (15070800).

Almost surely, 2^210420042 is an apocalyptic number.

210420042 is an abundant number, since it is smaller than the sum of its proper divisors (271845558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210420042 is a wasteful number, since it uses less digits than its factorization.

210420042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13610.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 210420042 is about 14505.8623321745. The cubic root of 210420042 is about 594.7882324321.

Adding to 210420042 its reverse (240024012), we get a palindrome (450444054).

The spelling of 210420042 in words is "two hundred ten million, four hundred twenty thousand, forty-two".