142519309 has 2 divisors, whose sum is σ = 142519310. Its totient is φ = 142519308.

The previous prime is 142519297. The next prime is 142519327. The reversal of 142519309 is 903915241.

142519309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139358025 + 3161284 = 11805^2 + 1778^2 .

It is a cyclic number.

It is not a de Polignac number, because 142519309 - 2⁵ = 142519277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142519379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71259654 + 71259655.

It is an arithmetic number, because the mean of its divisors is an integer number (71259655).

Almost surely, 2^142519309 is an apocalyptic number.

It is an amenable number.

142519309 is a deficient number, since it is larger than the sum of its proper divisors (1).

142519309 is an equidigital number, since it uses as much as digits as its factorization.

142519309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 142519309 is about 11938.1451239294. The cubic root of 142519309 is about 522.3455541931.

The spelling of 142519309 in words is "one hundred forty-two million, five hundred nineteen thousand, three hundred nine".