154145 has 4 divisors (see below), whose sum is σ = 184980. Its totient is φ = 123312.

The previous prime is 154127. The next prime is 154153. The reversal of 154145 is 541451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541451 = 311 ⋅1741.

It can be written as a sum of positive squares in 2 ways, for example, as 99856 + 54289 = 316^2 + 233^2 .

It is a cyclic number.

It is not a de Polignac number, because 154145 - 2⁶ = 154081 is a prime.

It is a Curzon number.

It is an unprimeable number.

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, 15410 + ... + 15419.

It is an arithmetic number, because the mean of its divisors is an integer number (46245).

2¹⁵⁴¹⁴⁵ is an apocalyptic number.

It is an amenable number.

154145 is a deficient number, since it is larger than the sum of its proper divisors (30835).

154145 is an equidigital number, since it uses as much as digits as its factorization.

154145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30834.

The product of its digits is 400, while the sum is 20.

The square root of 154145 is about 392.6130410468. The cubic root of 154145 is about 53.6179016836.

Adding to 154145 its reverse (541451), we get a palindrome (695596).

The spelling of 154145 in words is "one hundred fifty-four thousand, one hundred forty-five".