421331242 has 8 divisors (see below), whose sum is σ = 641429856. Its totient is φ = 207521292.

The previous prime is 421331231. The next prime is 421331279. The reversal of 421331242 is 242133124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1571998 + ... + 1572265.

It is an arithmetic number, because the mean of its divisors is an integer number (80178732).

Almost surely, 2^421331242 is an apocalyptic number.

421331242 is a deficient number, since it is larger than the sum of its proper divisors (220098614).

421331242 is a wasteful number, since it uses less digits than its factorization.

421331242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3144332.

The product of its digits is 1152, while the sum is 22.

The square root of 421331242 is about 20526.3548152126. The cubic root of 421331242 is about 749.6776344975.

Adding to 421331242 its reverse (242133124), we get a palindrome (663464366).

It can be divided in two parts, 42133124 and 2, that multiplied together give a palindrome (84266248).

The spelling of 421331242 in words is "four hundred twenty-one million, three hundred thirty-one thousand, two hundred forty-two".