126836681 has 2 divisors, whose sum is σ = 126836682. Its totient is φ = 126836680.

The previous prime is 126836641. The next prime is 126836687. The reversal of 126836681 is 186638621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118374400 + 8462281 = 10880^2 + 2909^2 .

It is a cyclic number.

It is not a de Polignac number, because 126836681 - 2⁶ = 126836617 is a prime.

It is a super-2 number, since 2×126836681² = 32175087294191522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126836687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63418340 + 63418341.

It is an arithmetic number, because the mean of its divisors is an integer number (63418341).

Almost surely, 2^126836681 is an apocalyptic number.

It is an amenable number.

126836681 is a deficient number, since it is larger than the sum of its proper divisors (1).

126836681 is an equidigital number, since it uses as much as digits as its factorization.

126836681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 41.

The square root of 126836681 is about 11262.1792296163. The cubic root of 126836681 is about 502.4370106601.

The spelling of 126836681 in words is "one hundred twenty-six million, eight hundred thirty-six thousand, six hundred eighty-one".