140030161 has 4 divisors (see below), whose sum is σ = 140741172. Its totient is φ = 139319152.

The previous prime is 140030159. The next prime is 140030167. The reversal of 140030161 is 161030041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 137945025 + 2085136 = 11745^2 + 1444^2 .

It is a cyclic number.

It is not a de Polignac number, because 140030161 - 2¹ = 140030159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140030167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355210 + ... + 355603.

It is an arithmetic number, because the mean of its divisors is an integer number (35185293).

Almost surely, 2^140030161 is an apocalyptic number.

It is an amenable number.

140030161 is a deficient number, since it is larger than the sum of its proper divisors (711011).

140030161 is an equidigital number, since it uses as much as digits as its factorization.

140030161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711010.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 140030161 is about 11833.4340324354. The cubic root of 140030161 is about 519.2866957969.

The spelling of 140030161 in words is "one hundred forty million, thirty thousand, one hundred sixty-one".