138043 has 8 divisors (see below), whose sum is σ = 146816. Its totient is φ = 129600.

The previous prime is 138041. The next prime is 138053. The reversal of 138043 is 340831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138043 - 2¹ = 138041 is a prime.

138043 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 138043.

It is not an unprimeable number, because it can be changed into a prime (138041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1855 + ... + 1927.

It is an arithmetic number, because the mean of its divisors is an integer number (18352).

2¹³⁸⁰⁴³ is an apocalyptic number.

138043 is a deficient number, since it is larger than the sum of its proper divisors (8773).

138043 is an equidigital number, since it uses as much as digits as its factorization.

138043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 138043 is about 371.5413839668. The cubic root of 138043 is about 51.6818593314.

Adding to 138043 its reverse (340831), we get a palindrome (478874).

It can be divided in two parts, 1380 and 43, that multiplied together give a triangular number (59340 = T₃₄₄).

The spelling of 138043 in words is "one hundred thirty-eight thousand, forty-three".