145200509 has 2 divisors, whose sum is σ = 145200510. Its totient is φ = 145200508.

The previous prime is 145200493. The next prime is 145200533. The reversal of 145200509 is 905002541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115498009 + 29702500 = 10747^2 + 5450^2 .

It is a cyclic number.

It is not a de Polignac number, because 145200509 - 2⁴ = 145200493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145200569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72600254 + 72600255.

It is an arithmetic number, because the mean of its divisors is an integer number (72600255).

Almost surely, 2^145200509 is an apocalyptic number.

It is an amenable number.

145200509 is a deficient number, since it is larger than the sum of its proper divisors (1).

145200509 is an equidigital number, since it uses as much as digits as its factorization.

145200509 is an evil number, because the sum of its binary digits is even.

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

The square root of 145200509 is about 12049.9173856089. The cubic root of 145200509 is about 525.6008347143.

The spelling of 145200509 in words is "one hundred forty-five million, two hundred thousand, five hundred nine".