146240009 has 2 divisors, whose sum is σ = 146240010. Its totient is φ = 146240008.

The previous prime is 146239999. The next prime is 146240047. The reversal of 146240009 is 900042641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127125625 + 19114384 = 11275^2 + 4372^2 .

It is a cyclic number.

It is not a de Polignac number, because 146240009 - 2⁴ = 146239993 is a prime.

It is a super-2 number, since 2×146240009² = 42772280464640162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 146240009.

It is not a weakly prime, because it can be changed into another prime (146240089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73120004 + 73120005.

It is an arithmetic number, because the mean of its divisors is an integer number (73120005).

Almost surely, 2^146240009 is an apocalyptic number.

It is an amenable number.

146240009 is a deficient number, since it is larger than the sum of its proper divisors (1).

146240009 is an equidigital number, since it uses as much as digits as its factorization.

146240009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 146240009 is about 12092.9735383817. The cubic root of 146240009 is about 526.8521237500.

The spelling of 146240009 in words is "one hundred forty-six million, two hundred forty thousand, nine".