126105901 has 4 divisors (see below), whose sum is σ = 126629404. Its totient is φ = 125582400.

The previous prime is 126105899. The next prime is 126105911. The reversal of 126105901 is 109501621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 109501621 = 3947 ⋅27743.

It can be written as a sum of positive squares in 2 ways, for example, as 56400100 + 69705801 = 7510^2 + 8349^2 .

It is a cyclic number.

It is not a de Polignac number, because 126105901 - 2¹ = 126105899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126105911) 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 in 3 ways as a sum of consecutive naturals, for example, 261390 + ... + 261871.

It is an arithmetic number, because the mean of its divisors is an integer number (31657351).

Almost surely, 2^126105901 is an apocalyptic number.

It is an amenable number.

126105901 is a deficient number, since it is larger than the sum of its proper divisors (523503).

126105901 is an equidigital number, since it uses as much as digits as its factorization.

126105901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523502.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 126105901 is about 11229.6883750174. The cubic root of 126105901 is about 501.4702074099.

The spelling of 126105901 in words is "one hundred twenty-six million, one hundred five thousand, nine hundred one".