154421143042 has 4 divisors (see below), whose sum is σ = 231631714566. Its totient is φ = 77210571520.

The previous prime is 154421143007. The next prime is 154421143049. The reversal of 154421143042 is 240341124451.

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: 240341124451 = 17 ⋅14137713203.

It can be written as a sum of positive squares in only one way, i.e., 142739640481 + 11681502561 = 377809^2 + 108081^2 .

It is a junction number, because it is equal to n+sod(n) for n = 154421142995 and 154421143013.

It is not an unprimeable number, because it can be changed into a prime (154421143049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38605285759 + ... + 38605285762.

Almost surely, 2^154421143042 is an apocalyptic number.

154421143042 is a deficient number, since it is larger than the sum of its proper divisors (77210571524).

154421143042 is an equidigital number, since it uses as much as digits as its factorization.

154421143042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77210571523.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 154421143042 its reverse (240341124451), we get a palindrome (394762267493).

The spelling of 154421143042 in words is "one hundred fifty-four billion, four hundred twenty-one million, one hundred forty-three thousand, forty-two".