142800509 has 2 divisors, whose sum is σ = 142800510. Its totient is φ = 142800508.

The previous prime is 142800487. The next prime is 142800529. The reversal of 142800509 is 905008241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97574884 + 45225625 = 9878^2 + 6725^2 .

It is an emirp because it is prime and its reverse (905008241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142800509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142800529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71400254 + 71400255.

It is an arithmetic number, because the mean of its divisors is an integer number (71400255).

Almost surely, 2^142800509 is an apocalyptic number.

It is an amenable number.

142800509 is a deficient number, since it is larger than the sum of its proper divisors (1).

142800509 is an equidigital number, since it uses as much as digits as its factorization.

142800509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 142800509 is about 11949.9166942703. The cubic root of 142800509 is about 522.6888692451.

The spelling of 142800509 in words is "one hundred forty-two million, eight hundred thousand, five hundred nine".