12972134858 has 4 divisors (see below), whose sum is σ = 19458202290. Its totient is φ = 6486067428.

The previous prime is 12972134809. The next prime is 12972134893. The reversal of 12972134858 is 85843127921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85843127921 = 257 ⋅334019953.

It can be written as a sum of positive squares in only one way, i.e., 9499036369 + 3473098489 = 97463^2 + 58933^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3243033713 + ... + 3243033716.

Almost surely, 2^12972134858 is an apocalyptic number.

12972134858 is a deficient number, since it is larger than the sum of its proper divisors (6486067432).

12972134858 is an equidigital number, since it uses as much as digits as its factorization.

12972134858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6486067431.

The product of its digits is 967680, while the sum is 50.

The spelling of 12972134858 in words is "twelve billion, nine hundred seventy-two million, one hundred thirty-four thousand, eight hundred fifty-eight".