140144161 has 2 divisors, whose sum is σ = 140144162. Its totient is φ = 140144160.

The previous prime is 140144143. The next prime is 140144189. The reversal of 140144161 is 161441041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129254161 + 10890000 = 11369^2 + 3300^2 .

It is an emirp because it is prime and its reverse (161441041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140144161 - 2¹¹ = 140142113 is a prime.

It is not a weakly prime, because it can be changed into another prime (140144111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70072080 + 70072081.

It is an arithmetic number, because the mean of its divisors is an integer number (70072081).

Almost surely, 2^140144161 is an apocalyptic number.

It is an amenable number.

140144161 is a deficient number, since it is larger than the sum of its proper divisors (1).

140144161 is an equidigital number, since it uses as much as digits as its factorization.

140144161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 140144161 is about 11838.2499128883. The cubic root of 140144161 is about 519.4275764600.

The spelling of 140144161 in words is "one hundred forty million, one hundred forty-four thousand, one hundred sixty-one".