421004042 has 8 divisors (see below), whose sum is σ = 631724832. Its totient is φ = 210429100.

The previous prime is 421004039. The next prime is 421004047. The reversal of 421004042 is 240400124.

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

It is a self number, because there is not a number n which added to its sum of digits gives 421004042.

It is not an unprimeable number, because it can be changed into a prime (421004047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28934 + ... + 40977.

It is an arithmetic number, because the mean of its divisors is an integer number (78965604).

Almost surely, 2^421004042 is an apocalyptic number.

421004042 is a deficient number, since it is larger than the sum of its proper divisors (210720790).

421004042 is a wasteful number, since it uses less digits than its factorization.

421004042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72924.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 421004042 is about 20518.3830259599. The cubic root of 421004042 is about 749.4835211552.

Adding to 421004042 its reverse (240400124), we get a palindrome (661404166).

The spelling of 421004042 in words is "four hundred twenty-one million, four thousand, forty-two".