126731161 has 2 divisors, whose sum is σ = 126731162. Its totient is φ = 126731160.

The previous prime is 126731153. The next prime is 126731177. The reversal of 126731161 is 161137621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71318025 + 55413136 = 8445^2 + 7444^2 .

It is an emirp because it is prime and its reverse (161137621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126731161 - 2³ = 126731153 is a prime.

It is a pancake number, because a pancake can be divided into 126731161 parts by 15920 straight cuts.

It is not a weakly prime, because it can be changed into another prime (126731261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63365580 + 63365581.

It is an arithmetic number, because the mean of its divisors is an integer number (63365581).

Almost surely, 2^126731161 is an apocalyptic number.

It is an amenable number.

126731161 is a deficient number, since it is larger than the sum of its proper divisors (1).

126731161 is an equidigital number, since it uses as much as digits as its factorization.

126731161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 126731161 is about 11257.4935487434. The cubic root of 126731161 is about 502.2976401930.

Adding to 126731161 its reverse (161137621), we get a palindrome (287868782).

The spelling of 126731161 in words is "one hundred twenty-six million, seven hundred thirty-one thousand, one hundred sixty-one".