40143 has 4 divisors (see below), whose sum is σ = 53528. Its totient is φ = 26760.

The previous prime is 40129. The next prime is 40151. The reversal of 40143 is 34104.

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

It is not a de Polignac number, because 40143 - 2⁴ = 40127 is a prime.

It is a super-2 number, since 2×40143² = 3222920898, which contains 22 as substring.

It is a D-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 (40123) 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, 6688 + ... + 6693.

It is an arithmetic number, because the mean of its divisors is an integer number (13382).

2⁴⁰¹⁴³ is an apocalyptic number.

40143 is a deficient number, since it is larger than the sum of its proper divisors (13385).

40143 is a wasteful number, since it uses less digits than its factorization.

40143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13384.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 40143 is about 200.3571810542. The cubic root of 40143 is about 34.2402248908.

Adding to 40143 its reverse (34104), we get a palindrome (74247).

It can be divided in two parts, 401 and 43, that added together give a palindrome (444).

The spelling of 40143 in words is "forty thousand, one hundred forty-three", and thus it is an iban number.