42420143 has 4 divisors (see below), whose sum is σ = 42483480. Its totient is φ = 42356808.

The previous prime is 42420109. The next prime is 42420181. The reversal of 42420143 is 34102424.

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 42420143 - 2²⁴ = 25642927 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 (42420943) 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, 30653 + ... + 32006.

It is an arithmetic number, because the mean of its divisors is an integer number (10620870).

Almost surely, 2^42420143 is an apocalyptic number.

42420143 is a deficient number, since it is larger than the sum of its proper divisors (63337).

42420143 is an equidigital number, since it uses as much as digits as its factorization.

42420143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63336.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 42420143 is about 6513.0747731006. The cubic root of 42420143 is about 348.7578909928.

Adding to 42420143 its reverse (34102424), we get a palindrome (76522567).

The spelling of 42420143 in words is "forty-two million, four hundred twenty thousand, one hundred forty-three".