142135247 has 2 divisors, whose sum is σ = 142135248. Its totient is φ = 142135246.

The previous prime is 142135229. The next prime is 142135261. The reversal of 142135247 is 742531241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142135247 - 2⁶ = 142135183 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142131247) 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 as a sum of consecutive naturals, namely, 71067623 + 71067624.

It is an arithmetic number, because the mean of its divisors is an integer number (71067624).

Almost surely, 2^142135247 is an apocalyptic number.

142135247 is a deficient number, since it is larger than the sum of its proper divisors (1).

142135247 is an equidigital number, since it uses as much as digits as its factorization.

142135247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 29.

The square root of 142135247 is about 11922.0487752735. The cubic root of 142135247 is about 521.8759253070.

Adding to 142135247 its reverse (742531241), we get a palindrome (884666488).

The spelling of 142135247 in words is "one hundred forty-two million, one hundred thirty-five thousand, two hundred forty-seven".