140281181 has 2 divisors, whose sum is σ = 140281182. Its totient is φ = 140281180.

The previous prime is 140281157. The next prime is 140281187. The reversal of 140281181 is 181182041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138415225 + 1865956 = 11765^2 + 1366^2 .

It is an emirp because it is prime and its reverse (181182041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140281181 is a prime.

It is a super-2 number, since 2×140281181² = 39357619485509522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 140281181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140281187) 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, 70140590 + 70140591.

It is an arithmetic number, because the mean of its divisors is an integer number (70140591).

Almost surely, 2^140281181 is an apocalyptic number.

It is an amenable number.

140281181 is a deficient number, since it is larger than the sum of its proper divisors (1).

140281181 is an equidigital number, since it uses as much as digits as its factorization.

140281181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 26.

The square root of 140281181 is about 11844.0356720165. The cubic root of 140281181 is about 519.5968040694.

The spelling of 140281181 in words is "one hundred forty million, two hundred eighty-one thousand, one hundred eighty-one".