126409001 has 2 divisors, whose sum is σ = 126409002. Its totient is φ = 126409000.

The previous prime is 126408973. The next prime is 126409043. The reversal of 126409001 is 100904621.

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., 88266025 + 38142976 = 9395^2 + 6176^2 .

It is an emirp because it is prime and its reverse (100904621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126409001 - 2⁶ = 126408937 is a prime.

It is not a weakly prime, because it can be changed into another prime (126409091) 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, 63204500 + 63204501.

It is an arithmetic number, because the mean of its divisors is an integer number (63204501).

Almost surely, 2^126409001 is an apocalyptic number.

It is an amenable number.

126409001 is a deficient number, since it is larger than the sum of its proper divisors (1).

126409001 is an equidigital number, since it uses as much as digits as its factorization.

126409001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 126409001 is about 11243.1757524287. The cubic root of 126409001 is about 501.8716530874.

The spelling of 126409001 in words is "one hundred twenty-six million, four hundred nine thousand, one".