140729 has 2 divisors, whose sum is σ = 140730. Its totient is φ = 140728.

The previous prime is 140717. The next prime is 140731. The reversal of 140729 is 927041.

140729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139129 + 1600 = 373^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 140729 - 2⁸ = 140473 is a prime.

Together with 140731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70364 + 70365.

It is an arithmetic number, because the mean of its divisors is an integer number (70365).

2¹⁴⁰⁷²⁹ is an apocalyptic number.

It is an amenable number.

140729 is a deficient number, since it is larger than the sum of its proper divisors (1).

140729 is an equidigital number, since it uses as much as digits as its factorization.

140729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 140729 is about 375.1386410382. The cubic root of 140729 is about 52.0149118969.

The spelling of 140729 in words is "one hundred forty thousand, seven hundred twenty-nine".