142242013 has 8 divisors (see below), whose sum is σ = 147377880. Its totient is φ = 137121600.

The previous prime is 142241963. The next prime is 142242017. The reversal of 142242013 is 310242241.

It can be written as a sum of positive squares in 4 ways, for example, as 34539129 + 107702884 = 5877^2 + 10378^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142242013 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 (142242017) 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, 16831 + ... + 23827.

It is an arithmetic number, because the mean of its divisors is an integer number (18422235).

Almost surely, 2^142242013 is an apocalyptic number.

It is an amenable number.

142242013 is a deficient number, since it is larger than the sum of its proper divisors (5135867).

142242013 is an equidigital number, since it uses as much as digits as its factorization.

142242013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7727.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 142242013 is about 11926.5256047182. The cubic root of 142242013 is about 522.0065629940.

Adding to 142242013 its reverse (310242241), we get a palindrome (452484254).

The spelling of 142242013 in words is "one hundred forty-two million, two hundred forty-two thousand, thirteen".