154139 has 4 divisors (see below), whose sum is σ = 163224. Its totient is φ = 145056.

The previous prime is 154127. The next prime is 154153. The reversal of 154139 is 931451.

It is a happy number.

154139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931451 = 29 ⋅32119.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154159) 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, 4517 + ... + 4550.

It is an arithmetic number, because the mean of its divisors is an integer number (40806).

2¹⁵⁴¹³⁹ is an apocalyptic number.

154139 is a deficient number, since it is larger than the sum of its proper divisors (9085).

154139 is an equidigital number, since it uses as much as digits as its factorization.

154139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9084.

The product of its digits is 540, while the sum is 23.

The square root of 154139 is about 392.6053998610. The cubic root of 154139 is about 53.6172059932.

The spelling of 154139 in words is "one hundred fifty-four thousand, one hundred thirty-nine".