126481009 has 2 divisors, whose sum is σ = 126481010. Its totient is φ = 126481008.

The previous prime is 126481007. The next prime is 126481027. The reversal of 126481009 is 900184621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95121009 + 31360000 = 9753^2 + 5600^2 .

It is a cyclic number.

It is not a de Polignac number, because 126481009 - 2¹ = 126481007 is a prime.

Together with 126481007, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126481001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63240504 + 63240505.

It is an arithmetic number, because the mean of its divisors is an integer number (63240505).

Almost surely, 2^126481009 is an apocalyptic number.

It is an amenable number.

126481009 is a deficient number, since it is larger than the sum of its proper divisors (1).

126481009 is an equidigital number, since it uses as much as digits as its factorization.

126481009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 126481009 is about 11246.3775945857. The cubic root of 126481009 is about 501.9669308862.

The spelling of 126481009 in words is "one hundred twenty-six million, four hundred eighty-one thousand, nine".