142500509 has 2 divisors, whose sum is σ = 142500510. Its totient is φ = 142500508.

The previous prime is 142500503. The next prime is 142500557. The reversal of 142500509 is 905005241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135792409 + 6708100 = 11653^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 142500509 - 2¹⁶ = 142434973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142500503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71250254 + 71250255.

It is an arithmetic number, because the mean of its divisors is an integer number (71250255).

Almost surely, 2^142500509 is an apocalyptic number.

It is an amenable number.

142500509 is a deficient number, since it is larger than the sum of its proper divisors (1).

142500509 is an equidigital number, since it uses as much as digits as its factorization.

142500509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 142500509 is about 11937.3577059582. The cubic root of 142500509 is about 522.3225853096.

The spelling of 142500509 in words is "one hundred forty-two million, five hundred thousand, five hundred nine".