420620055 has 16 divisors (see below), whose sum is σ = 679657824. Its totient is φ = 222108800.

The previous prime is 420620051. The next prime is 420620077. The reversal of 420620055 is 550026024.

It is not a de Polignac number, because 420620055 - 2² = 420620051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420620051) 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 15 ways as a sum of consecutive naturals, for example, 137304 + ... + 140333.

It is an arithmetic number, because the mean of its divisors is an integer number (42478614).

Almost surely, 2^420620055 is an apocalyptic number.

420620055 is a deficient number, since it is larger than the sum of its proper divisors (259037769).

420620055 is a wasteful number, since it uses less digits than its factorization.

420620055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277746.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 420620055 is about 20509.0237456589. The cubic root of 420620055 is about 749.2555902722.

Adding to 420620055 its reverse (550026024), we get a palindrome (970646079).

The spelling of 420620055 in words is "four hundred twenty million, six hundred twenty thousand, fifty-five".