12442543154 has 8 divisors (see below), whose sum is σ = 18674817948. Its totient is φ = 6217603840.

The previous prime is 12442543147. The next prime is 12442543163. The reversal of 12442543154 is 45134524421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12440056225 + 2486929 = 111535^2 + 1577^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1829627 + ... + 1836414.

Almost surely, 2^12442543154 is an apocalyptic number.

12442543154 is a deficient number, since it is larger than the sum of its proper divisors (6232274794).

12442543154 is a wasteful number, since it uses less digits than its factorization.

12442543154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3667740.

The product of its digits is 76800, while the sum is 35.

The spelling of 12442543154 in words is "twelve billion, four hundred forty-two million, five hundred forty-three thousand, one hundred fifty-four".