126704213291 has 4 divisors (see below), whose sum is σ = 128010442392. Its totient is φ = 125397984192.

The previous prime is 126704213281. The next prime is 126704213299. The reversal of 126704213291 is 192312407621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126704213291 - 2⁶ = 126704213227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126704213299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653114405 + ... + 653114598.

It is an arithmetic number, because the mean of its divisors is an integer number (32002610598).

Almost surely, 2^126704213291 is an apocalyptic number.

126704213291 is a deficient number, since it is larger than the sum of its proper divisors (1306229101).

126704213291 is an equidigital number, since it uses as much as digits as its factorization.

126704213291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306229100.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 126704213291 in words is "one hundred twenty-six billion, seven hundred four million, two hundred thirteen thousand, two hundred ninety-one".