126532181 has 2 divisors, whose sum is σ = 126532182. Its totient is φ = 126532180.

The previous prime is 126532163. The next prime is 126532183. The reversal of 126532181 is 181235621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110460100 + 16072081 = 10510^2 + 4009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126532181 is a prime.

It is a super-2 number, since 2×126532181² = 32020785657233522, which contains 22 as substring.

Together with 126532183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126532183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63266090 + 63266091.

It is an arithmetic number, because the mean of its divisors is an integer number (63266091).

Almost surely, 2^126532181 is an apocalyptic number.

It is an amenable number.

126532181 is a deficient number, since it is larger than the sum of its proper divisors (1).

126532181 is an equidigital number, since it uses as much as digits as its factorization.

126532181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 126532181 is about 11248.6524081776. The cubic root of 126532181 is about 502.0346174336.

The spelling of 126532181 in words is "one hundred twenty-six million, five hundred thirty-two thousand, one hundred eighty-one".