420137855 has 4 divisors (see below), whose sum is σ = 504165432. Its totient is φ = 336110280.

The previous prime is 420137807. The next prime is 420137857. The reversal of 420137855 is 558731024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 420137855 - 2⁶ = 420137791 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 (420137857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42013781 + ... + 42013790.

It is an arithmetic number, because the mean of its divisors is an integer number (126041358).

Almost surely, 2^420137855 is an apocalyptic number.

420137855 is a deficient number, since it is larger than the sum of its proper divisors (84027577).

420137855 is an equidigital number, since it uses as much as digits as its factorization.

420137855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84027576.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 420137855 is about 20497.2645735962. The cubic root of 420137855 is about 748.9691645609.

Adding to 420137855 its reverse (558731024), we get a palindrome (978868879).

The spelling of 420137855 in words is "four hundred twenty million, one hundred thirty-seven thousand, eight hundred fifty-five".