126431671307042 has 4 divisors (see below), whose sum is σ = 189647506960566. Its totient is φ = 63215835653520.

The previous prime is 126431671307041. The next prime is 126431671307083. The reversal of 126431671307042 is 240703176134621.

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

It can be written as a sum of positive squares in only one way, i.e., 103414235379841 + 23017435927201 = 10169279^2 + 4797649^2 .

It is not an unprimeable number, because it can be changed into a prime (126431671307041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31607917826759 + ... + 31607917826762.

Almost surely, 2^{126431671307042} is an apocalyptic number.

126431671307042 is a deficient number, since it is larger than the sum of its proper divisors (63215835653524).

126431671307042 is an equidigital number, since it uses as much as digits as its factorization.

126431671307042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63215835653523.

The product of its (nonzero) digits is 1016064, while the sum is 47.

The spelling of 126431671307042 in words is "one hundred twenty-six trillion, four hundred thirty-one billion, six hundred seventy-one million, three hundred seven thousand, forty-two".