420240055 has 8 divisors (see below), whose sum is σ = 504602352. Its totient is φ = 335982528.

The previous prime is 420240031. The next prime is 420240059. The reversal of 420240055 is 550042024.

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 420240055 - 2⁹ = 420239543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420240059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17077 + ... + 33646.

It is an arithmetic number, because the mean of its divisors is an integer number (63075294).

Almost surely, 2^420240055 is an apocalyptic number.

420240055 is a deficient number, since it is larger than the sum of its proper divisors (84362297).

420240055 is a wasteful number, since it uses less digits than its factorization.

420240055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52385.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 420240055 is about 20499.7574375894. The cubic root of 420240055 is about 749.0298894254.

Adding to 420240055 its reverse (550042024), we get a palindrome (970282079).

The spelling of 420240055 in words is "four hundred twenty million, two hundred forty thousand, fifty-five".