421204055 has 8 divisors (see below), whose sum is σ = 509082000. Its totient is φ = 334538496.

The previous prime is 421204031. The next prime is 421204057. The reversal of 421204055 is 550402124.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 421204055 - 2¹² = 421199959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421204055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421204057) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 302330 + ... + 303719.

It is an arithmetic number, because the mean of its divisors is an integer number (63635250).

Almost surely, 2^421204055 is an apocalyptic number.

421204055 is a deficient number, since it is larger than the sum of its proper divisors (87877945).

421204055 is a wasteful number, since it uses less digits than its factorization.

421204055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606193.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 421204055 is about 20523.2564423875. The cubic root of 421204055 is about 749.6021919987.

Adding to 421204055 its reverse (550402124), we get a palindrome (971606179).

The spelling of 421204055 in words is "four hundred twenty-one million, two hundred four thousand, fifty-five".