126876109 has 4 divisors (see below), whose sum is σ = 128040220. Its totient is φ = 125712000.

The previous prime is 126876107. The next prime is 126876163. The reversal of 126876109 is 901678621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 901678621 = 107 ⋅8426903.

It can be written as a sum of positive squares in 2 ways, for example, as 99940009 + 26936100 = 9997^2 + 5190^2 .

It is a cyclic number.

It is not a de Polignac number, because 126876109 - 2¹ = 126876107 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 (126876107) 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 3 ways as a sum of consecutive naturals, for example, 581892 + ... + 582109.

It is an arithmetic number, because the mean of its divisors is an integer number (32010055).

Almost surely, 2^126876109 is an apocalyptic number.

It is an amenable number.

126876109 is a deficient number, since it is larger than the sum of its proper divisors (1164111).

126876109 is a wasteful number, since it uses less digits than its factorization.

126876109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164110.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 126876109 is about 11263.9295541121. The cubic root of 126876109 is about 502.4890671945.

It can be divided in two parts, 1268 and 76109, that added together give a palindrome (77377).

The spelling of 126876109 in words is "one hundred twenty-six million, eight hundred seventy-six thousand, one hundred nine".