421022242 has 4 divisors (see below), whose sum is σ = 631533366. Its totient is φ = 210511120.

The previous prime is 421022233. The next prime is 421022249. The reversal of 421022242 is 242220124.

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

It can be written as a sum of positive squares in only one way, i.e., 225330121 + 195692121 = 15011^2 + 13989^2 .

It is not an unprimeable number, because it can be changed into a prime (421022249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105255559 + ... + 105255562.

Almost surely, 2^421022242 is an apocalyptic number.

421022242 is a deficient number, since it is larger than the sum of its proper divisors (210511124).

421022242 is a wasteful number, since it uses less digits than its factorization.

421022242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210511123.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 421022242 is about 20518.8265259005. The cubic root of 421022242 is about 749.4943210543.

Adding to 421022242 its reverse (242220124), we get a palindrome (663242366).

It can be divided in two parts, 42102 and 2242, that added together give a palindrome (44344).

The spelling of 421022242 in words is "four hundred twenty-one million, twenty-two thousand, two hundred forty-two".