421402242 has 16 divisors (see below), whose sum is σ = 843010560. Its totient is φ = 140433072.

The previous prime is 421402231. The next prime is 421402243. The reversal of 421402242 is 242204124.

It is not an unprimeable number, because it can be changed into a prime (421402243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35088 + ... + 45540.

It is an arithmetic number, because the mean of its divisors is an integer number (52688160).

Almost surely, 2^421402242 is an apocalyptic number.

421402242 is an abundant number, since it is smaller than the sum of its proper divisors (421608318).

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

421402242 is a wasteful number, since it uses less digits than its factorization.

421402242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17177.

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

The square root of 421402242 is about 20528.0842262497. The cubic root of 421402242 is about 749.7197423984.

Adding to 421402242 its reverse (242204124), we get a palindrome (663606366).

The spelling of 421402242 in words is "four hundred twenty-one million, four hundred two thousand, two hundred forty-two".