420321442 has 4 divisors (see below), whose sum is σ = 630482166. Its totient is φ = 210160720.

The previous prime is 420321437. The next prime is 420321449. The reversal of 420321442 is 244123024.

It is a happy number.

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., 217002361 + 203319081 = 14731^2 + 14259^2 .

It is a super-2 number, since 2×420321442² = 353340229209918728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (420321449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105080359 + ... + 105080362.

Almost surely, 2^420321442 is an apocalyptic number.

420321442 is a deficient number, since it is larger than the sum of its proper divisors (210160724).

420321442 is a wasteful number, since it uses less digits than its factorization.

420321442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210160723.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 420321442 is about 20501.7424137560. The cubic root of 420321442 is about 749.0782406474.

Adding to 420321442 its reverse (244123024), we get a palindrome (664444466).

The spelling of 420321442 in words is "four hundred twenty million, three hundred twenty-one thousand, four hundred forty-two".