421420242 has 32 divisors (see below), whose sum is σ = 895795200. Its totient is φ = 131710208.

The previous prime is 421420217. The next prime is 421420243. The reversal of 421420242 is 242024124.

It is not an unprimeable number, because it can be changed into a prime (421420243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19759 + ... + 35117.

It is an arithmetic number, because the mean of its divisors is an integer number (27993600).

Almost surely, 2^421420242 is an apocalyptic number.

421420242 is an abundant number, since it is smaller than the sum of its proper divisors (474374958).

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

421420242 is a wasteful number, since it uses less digits than its factorization.

421420242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15650.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 421420242 is about 20528.5226453342. The cubic root of 421420242 is about 749.7304168893.

Adding to 421420242 its reverse (242024124), we get a palindrome (663444366).

The spelling of 421420242 in words is "four hundred twenty-one million, four hundred twenty thousand, two hundred forty-two".