142242143 has 4 divisors (see below), whose sum is σ = 148426608. Its totient is φ = 136057680.

The previous prime is 142242137. The next prime is 142242169. The reversal of 142242143 is 341242241.

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 142242143 - 2²⁰ = 141193567 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 6184441 = 142242143 / (1 + 4 + 2 + 2 + 4 + 2 + 1 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142242173) 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, 3092198 + ... + 3092243.

It is an arithmetic number, because the mean of its divisors is an integer number (37106652).

Almost surely, 2^142242143 is an apocalyptic number.

142242143 is a deficient number, since it is larger than the sum of its proper divisors (6184465).

142242143 is an equidigital number, since it uses as much as digits as its factorization.

142242143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6184464.

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

The square root of 142242143 is about 11926.5310547535. The cubic root of 142242143 is about 522.0067220207.

Adding to 142242143 its reverse (341242241), we get a palindrome (483484384).

The spelling of 142242143 in words is "one hundred forty-two million, two hundred forty-two thousand, one hundred forty-three".