140712217 has 2 divisors, whose sum is σ = 140712218. Its totient is φ = 140712216.

The previous prime is 140712203. The next prime is 140712223. The reversal of 140712217 is 712217041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134467216 + 6245001 = 11596^2 + 2499^2 .

It is a cyclic number.

It is not a de Polignac number, because 140712217 - 2¹⁵ = 140679449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140712191 and 140712200.

It is not a weakly prime, because it can be changed into another prime (140715217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70356108 + 70356109.

It is an arithmetic number, because the mean of its divisors is an integer number (70356109).

Almost surely, 2^140712217 is an apocalyptic number.

It is an amenable number.

140712217 is a deficient number, since it is larger than the sum of its proper divisors (1).

140712217 is an equidigital number, since it uses as much as digits as its factorization.

140712217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 140712217 is about 11862.2180472288. The cubic root of 140712217 is about 520.1284409054.

Adding to 140712217 its reverse (712217041), we get a palindrome (852929258).

The spelling of 140712217 in words is "one hundred forty million, seven hundred twelve thousand, two hundred seventeen".