126212137 has 2 divisors, whose sum is σ = 126212138. Its totient is φ = 126212136.

The previous prime is 126212113. The next prime is 126212153. The reversal of 126212137 is 731212621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79138816 + 47073321 = 8896^2 + 6861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126212137 is a prime.

It is a super-2 number, since 2×126212137² = 31859007052213538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126212167) 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, 63106068 + 63106069.

It is an arithmetic number, because the mean of its divisors is an integer number (63106069).

Almost surely, 2^126212137 is an apocalyptic number.

It is an amenable number.

126212137 is a deficient number, since it is larger than the sum of its proper divisors (1).

126212137 is an equidigital number, since it uses as much as digits as its factorization.

126212137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 126212137 is about 11234.4175193910. The cubic root of 126212137 is about 501.6109865368.

Adding to 126212137 its reverse (731212621), we get a palindrome (857424758).

The spelling of 126212137 in words is "one hundred twenty-six million, two hundred twelve thousand, one hundred thirty-seven".