140235247 has 2 divisors, whose sum is σ = 140235248. Its totient is φ = 140235246.

The previous prime is 140235241. The next prime is 140235259. The reversal of 140235247 is 742532041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140235247 - 2³ = 140235239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140235241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70117623 + 70117624.

It is an arithmetic number, because the mean of its divisors is an integer number (70117624).

Almost surely, 2^140235247 is an apocalyptic number.

140235247 is a deficient number, since it is larger than the sum of its proper divisors (1).

140235247 is an equidigital number, since it uses as much as digits as its factorization.

140235247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 140235247 is about 11842.0963937978. The cubic root of 140235247 is about 519.5400852115.

Adding to 140235247 its reverse (742532041), we get a palindrome (882767288).

The spelling of 140235247 in words is "one hundred forty million, two hundred thirty-five thousand, two hundred forty-seven".