420243143 has 8 divisors (see below), whose sum is σ = 439329408. Its totient is φ = 401224824.

The previous prime is 420243139. The next prime is 420243149. The reversal of 420243143 is 341342024.

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

It is a cyclic number.

It is not a de Polignac number, because 420243143 - 2² = 420243139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420243149) 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, 4121 + ... + 29282.

It is an arithmetic number, because the mean of its divisors is an integer number (54916176).

Almost surely, 2^420243143 is an apocalyptic number.

420243143 is a deficient number, since it is larger than the sum of its proper divisors (19086265).

420243143 is a wasteful number, since it uses less digits than its factorization.

420243143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33973.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 420243143 is about 20499.8327554153. The cubic root of 420243143 is about 749.0317240899.

Adding to 420243143 its reverse (341342024), we get a palindrome (761585167).

The spelling of 420243143 in words is "four hundred twenty million, two hundred forty-three thousand, one hundred forty-three".