140512161 has 4 divisors (see below), whose sum is σ = 187349552. Its totient is φ = 93674772.

The previous prime is 140512159. The next prime is 140512213. The reversal of 140512161 is 161215041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 140512161 - 2¹ = 140512159 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140512121) 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, 23418691 + ... + 23418696.

It is an arithmetic number, because the mean of its divisors is an integer number (46837388).

Almost surely, 2^140512161 is an apocalyptic number.

It is an amenable number.

140512161 is a deficient number, since it is larger than the sum of its proper divisors (46837391).

140512161 is an equidigital number, since it uses as much as digits as its factorization.

140512161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46837390.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 140512161 is about 11853.7825608537. The cubic root of 140512161 is about 519.8818284233.

The spelling of 140512161 in words is "one hundred forty million, five hundred twelve thousand, one hundred sixty-one".