126500213 has 18 divisors (see below), whose sum is σ = 156336066. Its totient is φ = 102039168.

The previous prime is 126500191. The next prime is 126500219. The reversal of 126500213 is 312005621.

It can be written as a sum of positive squares in 3 ways, for example, as 35736484 + 90763729 = 5978^2 + 9527^2 .

It is not a de Polignac number, because 126500213 - 2¹⁶ = 126434677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126500219) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9695 + ... + 18627.

It is an arithmetic number, because the mean of its divisors is an integer number (8685337).

Almost surely, 2^126500213 is an apocalyptic number.

It is an amenable number.

126500213 is a deficient number, since it is larger than the sum of its proper divisors (29835853).

126500213 is an equidigital number, since it uses as much as digits as its factorization.

126500213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8981 (or 8957 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 126500213 is about 11247.2313482030. The cubic root of 126500213 is about 501.9923346607.

Adding to 126500213 its reverse (312005621), we get a palindrome (438505834).

The spelling of 126500213 in words is "one hundred twenty-six million, five hundred thousand, two hundred thirteen".