142044013 has 4 divisors (see below), whose sum is σ = 142070080. Its totient is φ = 142017948.

The previous prime is 142043989. The next prime is 142044017. The reversal of 142044013 is 310440241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310440241 = 59 ⋅5261699.

It is a cyclic number.

It is not a de Polignac number, because 142044013 - 2¹³ = 142035821 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 (142044017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1395 + ... + 16912.

It is an arithmetic number, because the mean of its divisors is an integer number (35517520).

Almost surely, 2^142044013 is an apocalyptic number.

It is an amenable number.

142044013 is a deficient number, since it is larger than the sum of its proper divisors (26067).

142044013 is an equidigital number, since it uses as much as digits as its factorization.

142044013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26066.

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

The square root of 142044013 is about 11918.2218891914. The cubic root of 142044013 is about 521.7642405559.

Adding to 142044013 its reverse (310440241), we get a palindrome (452484254).

The spelling of 142044013 in words is "one hundred forty-two million, forty-four thousand, thirteen".