142564309 has 2 divisors, whose sum is σ = 142564310. Its totient is φ = 142564308.

The previous prime is 142564297. The next prime is 142564333. The reversal of 142564309 is 903465241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110040100 + 32524209 = 10490^2 + 5703^2 .

It is a cyclic number.

It is not a de Polignac number, because 142564309 - 2²¹ = 140467157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142562309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71282154 + 71282155.

It is an arithmetic number, because the mean of its divisors is an integer number (71282155).

Almost surely, 2^142564309 is an apocalyptic number.

It is an amenable number.

142564309 is a deficient number, since it is larger than the sum of its proper divisors (1).

142564309 is an equidigital number, since it uses as much as digits as its factorization.

142564309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 142564309 is about 11940.0296900803. The cubic root of 142564309 is about 522.4005247011.

The spelling of 142564309 in words is "one hundred forty-two million, five hundred sixty-four thousand, three hundred nine".