138151 has 4 divisors (see below), whose sum is σ = 148792. Its totient is φ = 127512.

The previous prime is 138143. The next prime is 138157. The reversal of 138151 is 151831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 151831 = 149 ⋅1019.

It is a cyclic number.

It is not a de Polignac number, because 138151 - 2³ = 138143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138157) 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, 5301 + ... + 5326.

It is an arithmetic number, because the mean of its divisors is an integer number (37198).

2¹³⁸¹⁵¹ is an apocalyptic number.

138151 is a deficient number, since it is larger than the sum of its proper divisors (10641).

138151 is a wasteful number, since it uses less digits than its factorization.

138151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10640.

The product of its digits is 120, while the sum is 19.

The square root of 138151 is about 371.6866960223. The cubic root of 138151 is about 51.6953338425.

Adding to 138151 its reverse (151831), we get a palindrome (289982).

It can be divided in two parts, 138 and 151, that added together give a square (289 = 17²).

The spelling of 138151 in words is "one hundred thirty-eight thousand, one hundred fifty-one".