140105161 has 6 divisors (see below), whose sum is σ = 162979530. Its totient is φ = 120090096.

The previous prime is 140105149. The next prime is 140105179. The reversal of 140105161 is 161501041.

140105161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 111429136 + 28676025 = 10556^2 + 5355^2 .

It is not a de Polignac number, because 140105161 - 2²⁵ = 106550729 is a prime.

It is a super-2 number, since 2×140105161² = 39258912277671842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140105101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1429596 + ... + 1429693.

It is an arithmetic number, because the mean of its divisors is an integer number (27163255).

Almost surely, 2^140105161 is an apocalyptic number.

It is an amenable number.

140105161 is a deficient number, since it is larger than the sum of its proper divisors (22874369).

140105161 is an equidigital number, since it uses as much as digits as its factorization.

140105161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2859303 (or 2859296 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 140105161 is about 11836.6025953396. The cubic root of 140105161 is about 519.3793890442.

The spelling of 140105161 in words is "one hundred forty million, one hundred five thousand, one hundred sixty-one".