126316421309 has 8 divisors (see below), whose sum is σ = 136038862680. Its totient is φ = 116594807616.

The previous prime is 126316421303. The next prime is 126316421327. The reversal of 126316421309 is 903124613621.

It can be written as a sum of positive squares in 4 ways, for example, as 56749721284 + 69566700025 = 238222^2 + 263755^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126316421309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126316421303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130439 + ... + 519275.

It is an arithmetic number, because the mean of its divisors is an integer number (17004857835).

Almost surely, 2^126316421309 is an apocalyptic number.

It is an amenable number.

126316421309 is a deficient number, since it is larger than the sum of its proper divisors (9722441371).

126316421309 is a wasteful number, since it uses less digits than its factorization.

126316421309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413839.

The product of its (nonzero) digits is 46656, while the sum is 38.

The spelling of 126316421309 in words is "one hundred twenty-six billion, three hundred sixteen million, four hundred twenty-one thousand, three hundred nine".