420430523 has 4 divisors (see below), whose sum is σ = 430684968. Its totient is φ = 410176080.

The previous prime is 420430513. The next prime is 420430529. The reversal of 420430523 is 325034024.

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

It is a cyclic number.

It is not a de Polignac number, because 420430523 - 2⁸ = 420430267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420430529) 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, 5127161 + ... + 5127242.

It is an arithmetic number, because the mean of its divisors is an integer number (107671242).

Almost surely, 2^420430523 is an apocalyptic number.

420430523 is a deficient number, since it is larger than the sum of its proper divisors (10254445).

420430523 is a wasteful number, since it uses less digits than its factorization.

420430523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10254444.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 420430523 is about 20504.4025272623. The cubic root of 420430523 is about 749.1430348168.

Adding to 420430523 its reverse (325034024), we get a palindrome (745464547).

The spelling of 420430523 in words is "four hundred twenty million, four hundred thirty thousand, five hundred twenty-three".