142341439 has 4 divisors (see below), whose sum is σ = 144346320. Its totient is φ = 140336560.

The previous prime is 142341401. The next prime is 142341443. The reversal of 142341439 is 934143241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934143241 = 3581 ⋅260861.

It is a cyclic number.

It is not a de Polignac number, because 142341439 - 2⁹ = 142340927 is a prime.

It is a super-2 number, since 2×142341439² = 40522170513181442, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142341439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142341539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002334 + ... + 1002475.

It is an arithmetic number, because the mean of its divisors is an integer number (36086580).

Almost surely, 2^142341439 is an apocalyptic number.

142341439 is a deficient number, since it is larger than the sum of its proper divisors (2004881).

142341439 is an equidigital number, since it uses as much as digits as its factorization.

142341439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004880.

The product of its digits is 10368, while the sum is 31.

The square root of 142341439 is about 11930.6931483464. The cubic root of 142341439 is about 522.1281607679.

The spelling of 142341439 in words is "one hundred forty-two million, three hundred forty-one thousand, four hundred thirty-nine".