420237655 has 8 divisors (see below), whose sum is σ = 507072384. Its totient is φ = 334332000.

The previous prime is 420237647. The next prime is 420237691. The reversal of 420237655 is 556732024.

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

It is not a de Polignac number, because 420237655 - 2³ = 420237647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420237655.

It is a congruent number.

It is an unprimeable number.

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, 231271 + ... + 233080.

It is an arithmetic number, because the mean of its divisors is an integer number (63384048).

Almost surely, 2^420237655 is an apocalyptic number.

420237655 is a deficient number, since it is larger than the sum of its proper divisors (86834729).

420237655 is a wasteful number, since it uses less digits than its factorization.

420237655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464537.

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 420237655 is about 20499.6989002278. The cubic root of 420237655 is about 749.0284635140.

Adding to 420237655 its reverse (556732024), we get a palindrome (976969679).

The spelling of 420237655 in words is "four hundred twenty million, two hundred thirty-seven thousand, six hundred fifty-five".