140169 has 4 divisors (see below), whose sum is σ = 186896. Its totient is φ = 93444.

The previous prime is 140167. The next prime is 140171. The reversal of 140169 is 961041.

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 an interprime number because it is at equal distance from previous prime (140167) and next prime (140171).

It is not a de Polignac number, because 140169 - 2¹ = 140167 is a prime.

It is a super-2 number, since 2×140169² = 39294697122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (140167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23359 + ... + 23364.

It is an arithmetic number, because the mean of its divisors is an integer number (46724).

2¹⁴⁰¹⁶⁹ is an apocalyptic number.

It is an amenable number.

140169 is a deficient number, since it is larger than the sum of its proper divisors (46727).

140169 is an equidigital number, since it uses as much as digits as its factorization.

140169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46726.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 140169 is about 374.3915063139. The cubic root of 140169 is about 51.9458262242.

It can be divided in two parts, 1401 and 69, that multiplied together give a palindrome (96669).

The spelling of 140169 in words is "one hundred forty thousand, one hundred sixty-nine".