120495509 has 2 divisors, whose sum is σ = 120495510. Its totient is φ = 120495508.

The previous prime is 120495469. The next prime is 120495517. The reversal of 120495509 is 905594021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76073284 + 44422225 = 8722^2 + 6665^2 .

It is a cyclic number.

It is not a de Polignac number, because 120495509 - 2¹⁶ = 120429973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120491509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60247754 + 60247755.

It is an arithmetic number, because the mean of its divisors is an integer number (60247755).

Almost surely, 2^120495509 is an apocalyptic number.

It is an amenable number.

120495509 is a deficient number, since it is larger than the sum of its proper divisors (1).

120495509 is an equidigital number, since it uses as much as digits as its factorization.

120495509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 120495509 is about 10977.0446386994. The cubic root of 120495509 is about 493.9203882590.

The spelling of 120495509 in words is "one hundred twenty million, four hundred ninety-five thousand, five hundred nine".