140040185 has 4 divisors (see below), whose sum is σ = 168048228. Its totient is φ = 112032144.

The previous prime is 140040181. The next prime is 140040211. The reversal of 140040185 is 581040041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 581040041 = 2777 ⋅209233.

It can be written as a sum of positive squares in 2 ways, for example, as 32959081 + 107081104 = 5741^2 + 10348^2 .

It is a cyclic number.

It is not a de Polignac number, because 140040185 - 2² = 140040181 is a prime.

It is a super-2 number, since 2×140040185² = 39222506829668450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140040185.

It is not an unprimeable number, because it can be changed into a prime (140040181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14004014 + ... + 14004023.

It is an arithmetic number, because the mean of its divisors is an integer number (42012057).

Almost surely, 2^140040185 is an apocalyptic number.

It is an amenable number.

140040185 is a deficient number, since it is larger than the sum of its proper divisors (28008043).

140040185 is an equidigital number, since it uses as much as digits as its factorization.

140040185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28008042.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 140040185 is about 11833.8575705473. The cubic root of 140040185 is about 519.2990864742.

The spelling of 140040185 in words is "one hundred forty million, forty thousand, one hundred eighty-five".