154340123 has 4 divisors (see below), whose sum is σ = 176388720. Its totient is φ = 132291528.

The previous prime is 154340111. The next prime is 154340141. The reversal of 154340123 is 321043451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 154340123 - 2¹⁶ = 154274587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154340183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11024288 + ... + 11024301.

It is an arithmetic number, because the mean of its divisors is an integer number (44097180).

Almost surely, 2^154340123 is an apocalyptic number.

154340123 is a deficient number, since it is larger than the sum of its proper divisors (22048597).

154340123 is an equidigital number, since it uses as much as digits as its factorization.

154340123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22048596.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 154340123 is about 12423.3700339320. The cubic root of 154340123 is about 536.4051604990.

Adding to 154340123 its reverse (321043451), we get a palindrome (475383574).

The spelling of 154340123 in words is "one hundred fifty-four million, three hundred forty thousand, one hundred twenty-three".