42021420143 has 4 divisors (see below), whose sum is σ = 42915492960. Its totient is φ = 41127347328.

The previous prime is 42021420139. The next prime is 42021420163. The reversal of 42021420143 is 34102412024.

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 42021420143 - 2² = 42021420139 is a prime.

It is a super-2 number, since 2×42021420143² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021420163) 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, 447036338 + ... + 447036431.

It is an arithmetic number, because the mean of its divisors is an integer number (10728873240).

Almost surely, 2^42021420143 is an apocalyptic number.

42021420143 is a deficient number, since it is larger than the sum of its proper divisors (894072817).

42021420143 is an equidigital number, since it uses as much as digits as its factorization.

42021420143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894072816.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 42021420143 its reverse (34102412024), we get a palindrome (76123832167).

The spelling of 42021420143 in words is "forty-two billion, twenty-one million, four hundred twenty thousand, one hundred forty-three".