140139121 has 2 divisors, whose sum is σ = 140139122. Its totient is φ = 140139120.

The previous prime is 140139113. The next prime is 140139137. The reversal of 140139121 is 121931041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71166096 + 68973025 = 8436^2 + 8305^2 .

It is a cyclic number.

It is not a de Polignac number, because 140139121 - 2³ = 140139113 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 140139092 and 140139101.

It is not a weakly prime, because it can be changed into another prime (140139821) 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, 70069560 + 70069561.

It is an arithmetic number, because the mean of its divisors is an integer number (70069561).

Almost surely, 2^140139121 is an apocalyptic number.

It is an amenable number.

140139121 is a deficient number, since it is larger than the sum of its proper divisors (1).

140139121 is an equidigital number, since it uses as much as digits as its factorization.

140139121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 140139121 is about 11838.0370416721. The cubic root of 140139121 is about 519.4213496663.

The spelling of 140139121 in words is "one hundred forty million, one hundred thirty-nine thousand, one hundred twenty-one".