420435 has 12 divisors (see below), whose sum is σ = 728832. Its totient is φ = 224208.

The previous prime is 420421. The next prime is 420439. The reversal of 420435 is 534024.

It is a happy number.

It is not a de Polignac number, because 420435 - 2⁴ = 420419 is a prime.

It is an Ulam number.

420435 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (420439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4627 + ... + 4716.

It is an arithmetic number, because the mean of its divisors is an integer number (60736).

2⁴²⁰⁴³⁵ is an apocalyptic number.

420435 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

420435 is a deficient number, since it is larger than the sum of its proper divisors (308397).

420435 is a wasteful number, since it uses less digits than its factorization.

420435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9354 (or 9351 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 420435 is about 648.4095927730. The cubic root of 420435 is about 74.9145693918.

Adding to 420435 its reverse (534024), we get a palindrome (954459).

The spelling of 420435 in words is "four hundred twenty thousand, four hundred thirty-five".