154138 has 4 divisors (see below), whose sum is σ = 231210. Its totient is φ = 77068.

The previous prime is 154127. The next prime is 154153. The reversal of 154138 is 831451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831451 = 31 ⋅26821.

It can be written as a sum of positive squares in only one way, i.e., 97969 + 56169 = 313^2 + 237^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38533 + ... + 38536.

2¹⁵⁴¹³⁸ is an apocalyptic number.

154138 is a deficient number, since it is larger than the sum of its proper divisors (77072).

154138 is an equidigital number, since it uses as much as digits as its factorization.

154138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77071.

The product of its digits is 480, while the sum is 22.

The square root of 154138 is about 392.6041263156. The cubic root of 154138 is about 53.6170900430.

Adding to 154138 its reverse (831451), we get a palindrome (985589).

It can be divided in two parts, 154 and 138, that added together give a palindrome (292).

The spelling of 154138 in words is "one hundred fifty-four thousand, one hundred thirty-eight".