421300442 has 4 divisors (see below), whose sum is σ = 631950666. Its totient is φ = 210650220.

The previous prime is 421300421. The next prime is 421300469. The reversal of 421300442 is 244003124.

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., 403567921 + 17732521 = 20089^2 + 4211^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105325109 + ... + 105325112.

Almost surely, 2^421300442 is an apocalyptic number.

421300442 is a deficient number, since it is larger than the sum of its proper divisors (210650224).

421300442 is a wasteful number, since it uses less digits than its factorization.

421300442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210650223.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 421300442 is about 20525.6045465170. The cubic root of 421300442 is about 749.6593665004.

Adding to 421300442 its reverse (244003124), we get a palindrome (665303566).

The spelling of 421300442 in words is "four hundred twenty-one million, three hundred thousand, four hundred forty-two".