126438161 has 2 divisors, whose sum is σ = 126438162. Its totient is φ = 126438160.

The previous prime is 126438077. The next prime is 126438227. The reversal of 126438161 is 161834621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91107025 + 35331136 = 9545^2 + 5944^2 .

It is a cyclic number.

It is not a de Polignac number, because 126438161 - 2²² = 122243857 is a prime.

It is not a weakly prime, because it can be changed into another prime (126438461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63219080 + 63219081.

It is an arithmetic number, because the mean of its divisors is an integer number (63219081).

Almost surely, 2^126438161 is an apocalyptic number.

It is an amenable number.

126438161 is a deficient number, since it is larger than the sum of its proper divisors (1).

126438161 is an equidigital number, since it uses as much as digits as its factorization.

126438161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 126438161 is about 11244.4724642822. The cubic root of 126438161 is about 501.9102406672.

The spelling of 126438161 in words is "one hundred twenty-six million, four hundred thirty-eight thousand, one hundred sixty-one".