142438013 has 4 divisors (see below), whose sum is σ = 142673280. Its totient is φ = 142202748.

The previous prime is 142437991. The next prime is 142438033. The reversal of 142438013 is 310834241.

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.

It is a cyclic number.

It is not a de Polignac number, because 142438013 - 2¹⁰ = 142436989 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 (142438033) 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, 116723 + ... + 117936.

It is an arithmetic number, because the mean of its divisors is an integer number (35668320).

Almost surely, 2^142438013 is an apocalyptic number.

It is an amenable number.

142438013 is a deficient number, since it is larger than the sum of its proper divisors (235267).

142438013 is an equidigital number, since it uses as much as digits as its factorization.

142438013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235266.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 142438013 is about 11934.7397541798. The cubic root of 142438013 is about 522.2462163531.

The spelling of 142438013 in words is "one hundred forty-two million, four hundred thirty-eight thousand, thirteen".