154117 has 4 divisors (see below), whose sum is σ = 155020. Its totient is φ = 153216.

The previous prime is 154111. The next prime is 154127. The reversal of 154117 is 711451.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 711451 = 13 ⋅54727.

It can be written as a sum of positive squares in 2 ways, for example, as 103041 + 51076 = 321^2 + 226^2 .

It is a cyclic number.

It is not a de Polignac number, because 154117 - 2¹⁵ = 121349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154094 and 154103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108 + ... + 565.

It is an arithmetic number, because the mean of its divisors is an integer number (38755).

2¹⁵⁴¹¹⁷ is an apocalyptic number.

It is an amenable number.

154117 is a deficient number, since it is larger than the sum of its proper divisors (903).

154117 is an equidigital number, since it uses as much as digits as its factorization.

154117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902.

The product of its digits is 140, while the sum is 19.

The square root of 154117 is about 392.5773809073. The cubic root of 154117 is about 53.6146549740.

Adding to 154117 its reverse (711451), we get a palindrome (865568).

The spelling of 154117 in words is "one hundred fifty-four thousand, one hundred seventeen".