126506113 has 4 divisors (see below), whose sum is σ = 127927620. Its totient is φ = 125084608.

The previous prime is 126506101. The next prime is 126506119. The reversal of 126506113 is 311605621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68029504 + 58476609 = 8248^2 + 7647^2 .

It is a cyclic number.

It is not a de Polignac number, because 126506113 - 2⁹ = 126505601 is a prime.

It is a super-3 number, since 3×126506113³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126506119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 710620 + ... + 710797.

It is an arithmetic number, because the mean of its divisors is an integer number (31981905).

Almost surely, 2^126506113 is an apocalyptic number.

It is an amenable number.

126506113 is a deficient number, since it is larger than the sum of its proper divisors (1421507).

126506113 is an equidigital number, since it uses as much as digits as its factorization.

126506113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421506.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 126506113 is about 11247.4936319164. The cubic root of 126506113 is about 502.0001388866. Note that the first 3 decimals are identical.

The spelling of 126506113 in words is "one hundred twenty-six million, five hundred six thousand, one hundred thirteen".