126251149 has 2 divisors, whose sum is σ = 126251150. Its totient is φ = 126251148.

The previous prime is 126251137. The next prime is 126251173. The reversal of 126251149 is 941152621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121220100 + 5031049 = 11010^2 + 2243^2 .

It is a cyclic number.

It is not a de Polignac number, because 126251149 - 2⁹ = 126250637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126251149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126251179) 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, 63125574 + 63125575.

It is an arithmetic number, because the mean of its divisors is an integer number (63125575).

Almost surely, 2^126251149 is an apocalyptic number.

It is an amenable number.

126251149 is a deficient number, since it is larger than the sum of its proper divisors (1).

126251149 is an equidigital number, since it uses as much as digits as its factorization.

126251149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 31.

The square root of 126251149 is about 11236.1536568347. The cubic root of 126251149 is about 501.6626636375.

The spelling of 126251149 in words is "one hundred twenty-six million, two hundred fifty-one thousand, one hundred forty-nine".