154420042123 has 8 divisors (see below), whose sum is σ = 154854364896. Its totient is φ = 153985828800.

The previous prime is 154420042099. The next prime is 154420042129. The reversal of 154420042123 is 321240024451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154420042123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154420042091 and 154420042100.

It is not an unprimeable number, because it can be changed into a prime (154420042129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3394458 + ... + 3439648.

It is an arithmetic number, because the mean of its divisors is an integer number (19356795612).

Almost surely, 2^154420042123 is an apocalyptic number.

154420042123 is a deficient number, since it is larger than the sum of its proper divisors (434322773).

154420042123 is an equidigital number, since it uses as much as digits as its factorization.

154420042123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54725.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 154420042123 its reverse (321240024451), we get a palindrome (475660066574).

The spelling of 154420042123 in words is "one hundred fifty-four billion, four hundred twenty million, forty-two thousand, one hundred twenty-three".