142519709 has 2 divisors, whose sum is σ = 142519710. Its totient is φ = 142519708.

The previous prime is 142519691. The next prime is 142519711. The reversal of 142519709 is 907915241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85562500 + 56957209 = 9250^2 + 7547^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142519709 is a prime.

Together with 142519711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142519309) 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, 71259854 + 71259855.

It is an arithmetic number, because the mean of its divisors is an integer number (71259855).

Almost surely, 2^142519709 is an apocalyptic number.

It is an amenable number.

142519709 is a deficient number, since it is larger than the sum of its proper divisors (1).

142519709 is an equidigital number, since it uses as much as digits as its factorization.

142519709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 142519709 is about 11938.1618769390. The cubic root of 142519709 is about 522.3460428708.

The spelling of 142519709 in words is "one hundred forty-two million, five hundred nineteen thousand, seven hundred nine".