142744139 has 2 divisors, whose sum is σ = 142744140. Its totient is φ = 142744138.

The previous prime is 142744117. The next prime is 142744157. The reversal of 142744139 is 931447241.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142744139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142744099 and 142744108.

It is not a weakly prime, because it can be changed into another prime (142744939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71372069 + 71372070.

It is an arithmetic number, because the mean of its divisors is an integer number (71372070).

Almost surely, 2^142744139 is an apocalyptic number.

142744139 is a deficient number, since it is larger than the sum of its proper divisors (1).

142744139 is an equidigital number, since it uses as much as digits as its factorization.

142744139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 35.

The square root of 142744139 is about 11947.5578676146. The cubic root of 142744139 is about 522.6200836608.

The spelling of 142744139 in words is "one hundred forty-two million, seven hundred forty-four thousand, one hundred thirty-nine".