140240161 has 2 divisors, whose sum is σ = 140240162. Its totient is φ = 140240160.

The previous prime is 140240129. The next prime is 140240267. The reversal of 140240161 is 161042041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89189136 + 51051025 = 9444^2 + 7145^2 .

It is a cyclic number.

It is not a de Polignac number, because 140240161 - 2⁵ = 140240129 is a prime.

It is not a weakly prime, because it can be changed into another prime (140240561) 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, 70120080 + 70120081.

It is an arithmetic number, because the mean of its divisors is an integer number (70120081).

Almost surely, 2^140240161 is an apocalyptic number.

It is an amenable number.

140240161 is a deficient number, since it is larger than the sum of its proper divisors (1).

140240161 is an equidigital number, since it uses as much as digits as its factorization.

140240161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 140240161 is about 11842.3038721357. The cubic root of 140240161 is about 519.5461535626.

The spelling of 140240161 in words is "one hundred forty million, two hundred forty thousand, one hundred sixty-one".