140512205 has 4 divisors (see below), whose sum is σ = 168614652. Its totient is φ = 112409760.

The previous prime is 140512159. The next prime is 140512213. The reversal of 140512205 is 502215041.

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 35593156 + 104919049 = 5966^2 + 10243^2 .

It is not a de Polignac number, because 140512205 - 2⁸ = 140511949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 14051216 + ... + 14051225.

It is an arithmetic number, because the mean of its divisors is an integer number (42153663).

Almost surely, 2^140512205 is an apocalyptic number.

It is an amenable number.

140512205 is a deficient number, since it is larger than the sum of its proper divisors (28102447).

140512205 is an equidigital number, since it uses as much as digits as its factorization.

140512205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28102446.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 140512205 is about 11853.7844168012. The cubic root of 140512205 is about 519.8818826886.

Adding to 140512205 its reverse (502215041), we get a palindrome (642727246).

The spelling of 140512205 in words is "one hundred forty million, five hundred twelve thousand, two hundred five".