154042123 has 2 divisors, whose sum is σ = 154042124. Its totient is φ = 154042122.

The previous prime is 154042121. The next prime is 154042127. The reversal of 154042123 is 321240451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 154042123 - 2¹ = 154042121 is a prime.

Together with 154042121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 154042094 and 154042103.

It is not a weakly prime, because it can be changed into another prime (154042121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77021061 + 77021062.

It is an arithmetic number, because the mean of its divisors is an integer number (77021062).

Almost surely, 2^154042123 is an apocalyptic number.

154042123 is a deficient number, since it is larger than the sum of its proper divisors (1).

154042123 is an equidigital number, since it uses as much as digits as its factorization.

154042123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 154042123 is about 12411.3707139864. The cubic root of 154042123 is about 536.0597076039.

Adding to 154042123 its reverse (321240451), we get a palindrome (475282574).

The spelling of 154042123 in words is "one hundred fifty-four million, forty-two thousand, one hundred twenty-three".