140241209 has 2 divisors, whose sum is σ = 140241210. Its totient is φ = 140241208.

The previous prime is 140241193. The next prime is 140241221. The reversal of 140241209 is 902142041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94381225 + 45859984 = 9715^2 + 6772^2 .

It is a cyclic number.

It is not a de Polignac number, because 140241209 - 2⁴ = 140241193 is a prime.

It is not a weakly prime, because it can be changed into another prime (140241509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70120604 + 70120605.

It is an arithmetic number, because the mean of its divisors is an integer number (70120605).

Almost surely, 2^140241209 is an apocalyptic number.

It is an amenable number.

140241209 is a deficient number, since it is larger than the sum of its proper divisors (1).

140241209 is an equidigital number, since it uses as much as digits as its factorization.

140241209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 140241209 is about 11842.3481201998. The cubic root of 140241209 is about 519.5474477307.

The spelling of 140241209 in words is "one hundred forty million, two hundred forty-one thousand, two hundred nine".