420503505 has 8 divisors (see below), whose sum is σ = 672805632. Its totient is φ = 224268528.

The previous prime is 420503471. The next prime is 420503507. The reversal of 420503505 is 505305024.

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

It is not a de Polignac number, because 420503505 - 2⁸ = 420503249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420503507) 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, 14016769 + ... + 14016798.

It is an arithmetic number, because the mean of its divisors is an integer number (84100704).

Almost surely, 2^420503505 is an apocalyptic number.

It is an amenable number.

420503505 is a deficient number, since it is larger than the sum of its proper divisors (252302127).

420503505 is a wasteful number, since it uses less digits than its factorization.

420503505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28033575.

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 420503505 is about 20506.1821166203. The cubic root of 420503505 is about 749.1863799045.

Adding to 420503505 its reverse (505305024), we get a palindrome (925808529).

The spelling of 420503505 in words is "four hundred twenty million, five hundred three thousand, five hundred five".