126366813 has 12 divisors (see below), whose sum is σ = 182637468. Its totient is φ = 84194880.

The previous prime is 126366811. The next prime is 126366817. The reversal of 126366813 is 318663621.

126366813 is a `hidden beast` number, since 1 + 2 + 636 + 6 + 8 + 13 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 47032164 + 79334649 = 6858^2 + 8907^2 .

It is not a de Polignac number, because 126366813 - 2¹ = 126366811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126366811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18481 + ... + 24377.

It is an arithmetic number, because the mean of its divisors is an integer number (15219789).

Almost surely, 2^126366813 is an apocalyptic number.

It is an amenable number.

126366813 is a deficient number, since it is larger than the sum of its proper divisors (56270655).

126366813 is a wasteful number, since it uses less digits than its factorization.

126366813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8284 (or 8281 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 126366813 is about 11241.2994355635. The cubic root of 126366813 is about 501.8158149825.

The spelling of 126366813 in words is "one hundred twenty-six million, three hundred sixty-six thousand, eight hundred thirteen".