420131503 has 4 divisors (see below), whose sum is σ = 458325288. Its totient is φ = 381937720.

The previous prime is 420131483. The next prime is 420131519. The reversal of 420131503 is 305131024.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420131503 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 (420131533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19096876 + ... + 19096897.

It is an arithmetic number, because the mean of its divisors is an integer number (114581322).

Almost surely, 2^420131503 is an apocalyptic number.

420131503 is a deficient number, since it is larger than the sum of its proper divisors (38193785).

420131503 is a wasteful number, since it uses less digits than its factorization.

420131503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38193784.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 420131503 is about 20497.1096255057. The cubic root of 420131503 is about 748.9653900251.

Adding to 420131503 its reverse (305131024), we get a palindrome (725262527).

The spelling of 420131503 in words is "four hundred twenty million, one hundred thirty-one thousand, five hundred three".