142306739 has 4 divisors (see below), whose sum is σ = 142335600. Its totient is φ = 142277880.

The previous prime is 142306687. The next prime is 142306753. The reversal of 142306739 is 937603241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 937603241 = 19 ⋅49347539.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142306739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142306699 and 142306708.

It is not an unprimeable number, because it can be changed into a prime (142305739) 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, 4964 + ... + 17585.

It is an arithmetic number, because the mean of its divisors is an integer number (35583900).

Almost surely, 2^142306739 is an apocalyptic number.

142306739 is a deficient number, since it is larger than the sum of its proper divisors (28861).

142306739 is an equidigital number, since it uses as much as digits as its factorization.

142306739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28860.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 142306739 is about 11929.2388273519. The cubic root of 142306739 is about 522.0857291805.

The spelling of 142306739 in words is "one hundred forty-two million, three hundred six thousand, seven hundred thirty-nine".