1242534123 has 6 divisors (see below), whose sum is σ = 1794771524. Its totient is φ = 828356076.

The previous prime is 1242534121. The next prime is 1242534133. The reversal of 1242534123 is 3214352421.

1242534123 is a `hidden beast` number, since 1 + 2 + 4 + 2 + 534 + 123 = 666.

It is not a de Polignac number, because 1242534123 - 2¹ = 1242534121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242534121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69029665 + ... + 69029682.

Almost surely, 2^1242534123 is an apocalyptic number.

1242534123 is a deficient number, since it is larger than the sum of its proper divisors (552237401).

1242534123 is a wasteful number, since it uses less digits than its factorization.

1242534123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138059353 (or 138059350 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 1242534123 is about 35249.5974870636. The cubic root of 1242534123 is about 1075.0684284547.

Adding to 1242534123 its reverse (3214352421), we get a palindrome (4456886544).

The spelling of 1242534123 in words is "one billion, two hundred forty-two million, five hundred thirty-four thousand, one hundred twenty-three".