420143 has 4 divisors (see below), whose sum is σ = 433728. Its totient is φ = 406560.

The previous prime is 420103. The next prime is 420149. The reversal of 420143 is 341024.

420143 is nontrivially palindromic in base 15.

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 420143 - 2¹⁸ = 157999 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 (420149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6746 + ... + 6807.

It is an arithmetic number, because the mean of its divisors is an integer number (108432).

2⁴²⁰¹⁴³ is an apocalyptic number.

420143 is a deficient number, since it is larger than the sum of its proper divisors (13585).

420143 is a wasteful number, since it uses less digits than its factorization.

420143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13584.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 420143 is about 648.1843873467. The cubic root of 420143 is about 74.8972221836.

Adding to 420143 its reverse (341024), we get a palindrome (761167).

The spelling of 420143 in words is "four hundred twenty thousand, one hundred forty-three", and thus it is an iban number.