154042121342 has 4 divisors (see below), whose sum is σ = 231063182016. Its totient is φ = 77021060670.

The previous prime is 154042121333. The next prime is 154042121357. The reversal of 154042121342 is 243121240451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 243121240451 = 96293 ⋅2524807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38510530334 + ... + 38510530337.

It is an arithmetic number, because the mean of its divisors is an integer number (57765795504).

Almost surely, 2^154042121342 is an apocalyptic number.

154042121342 is a deficient number, since it is larger than the sum of its proper divisors (77021060674).

154042121342 is an equidigital number, since it uses as much as digits as its factorization.

154042121342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77021060673.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 154042121342 its reverse (243121240451), we get a palindrome (397163361793).

The spelling of 154042121342 in words is "one hundred fifty-four billion, forty-two million, one hundred twenty-one thousand, three hundred forty-two".