126765181 has 2 divisors, whose sum is σ = 126765182. Its totient is φ = 126765180.

The previous prime is 126765179. The next prime is 126765203. The reversal of 126765181 is 181567621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126765081 + 100 = 11259^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 126765181 - 2¹ = 126765179 is a prime.

It is a super-2 number, since 2×126765181² = 32138822227925522, which contains 22 as substring.

Together with 126765179, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 126765181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126765101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63382590 + 63382591.

It is an arithmetic number, because the mean of its divisors is an integer number (63382591).

Almost surely, 2^126765181 is an apocalyptic number.

It is an amenable number.

126765181 is a deficient number, since it is larger than the sum of its proper divisors (1).

126765181 is an equidigital number, since it uses as much as digits as its factorization.

126765181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 126765181 is about 11259.0044408909. The cubic root of 126765181 is about 502.3425821440.

The spelling of 126765181 in words is "one hundred twenty-six million, seven hundred sixty-five thousand, one hundred eighty-one".