126261001 has 2 divisors, whose sum is σ = 126261002. Its totient is φ = 126261000.

The previous prime is 126260993. The next prime is 126261049. The reversal of 126261001 is 100162621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102495376 + 23765625 = 10124^2 + 4875^2 .

It is a cyclic number.

It is not a de Polignac number, because 126261001 - 2³ = 126260993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126261001.

It is not a weakly prime, because it can be changed into another prime (126261101) 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, 63130500 + 63130501.

It is an arithmetic number, because the mean of its divisors is an integer number (63130501).

Almost surely, 2^126261001 is an apocalyptic number.

It is an amenable number.

126261001 is a deficient number, since it is larger than the sum of its proper divisors (1).

126261001 is an equidigital number, since it uses as much as digits as its factorization.

126261001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 126261001 is about 11236.5920545333. The cubic root of 126261001 is about 501.6757123689.

The spelling of 126261001 in words is "one hundred twenty-six million, two hundred sixty-one thousand, one".