126206137 has 2 divisors, whose sum is σ = 126206138. Its totient is φ = 126206136.

The previous prime is 126206099. The next prime is 126206141. The reversal of 126206137 is 731602621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119596096 + 6610041 = 10936^2 + 2571^2 .

It is a cyclic number.

It is not a de Polignac number, because 126206137 - 2¹⁹ = 125681849 is a prime.

It is not a weakly prime, because it can be changed into another prime (126206167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63103068 + 63103069.

It is an arithmetic number, because the mean of its divisors is an integer number (63103069).

Almost surely, 2^126206137 is an apocalyptic number.

It is an amenable number.

126206137 is a deficient number, since it is larger than the sum of its proper divisors (1).

126206137 is an equidigital number, since it uses as much as digits as its factorization.

126206137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 126206137 is about 11234.1504796758. The cubic root of 126206137 is about 501.6030377143.

Adding to 126206137 its reverse (731602621), we get a palindrome (857808758).

The spelling of 126206137 in words is "one hundred twenty-six million, two hundred six thousand, one hundred thirty-seven".