40159 has 4 divisors (see below), whose sum is σ = 45904. Its totient is φ = 34416.

The previous prime is 40153. The next prime is 40163. The reversal of 40159 is 95104.

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

It is a cyclic number.

It is not a de Polignac number, because 40159 - 2³ = 40151 is a prime.

It is a super-2 number, since 2×40159² = 3225490562, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40151) 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, 2862 + ... + 2875.

It is an arithmetic number, because the mean of its divisors is an integer number (11476).

2⁴⁰¹⁵⁹ is an apocalyptic number.

40159 is a deficient number, since it is larger than the sum of its proper divisors (5745).

40159 is an equidigital number, since it uses as much as digits as its factorization.

40159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5744.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 40159 is about 200.3971057675. The cubic root of 40159 is about 34.2447733868.

Subtracting 40159 from its reverse (95104), we obtain a palindrome (54945).

The spelling of 40159 in words is "forty thousand, one hundred fifty-nine".