126613 has 2 divisors, whose sum is σ = 126614. Its totient is φ = 126612.

The previous prime is 126611. The next prime is 126631. The reversal of 126613 is 316621.

Together with next prime (126631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79524 + 47089 = 282^2 + 217^2 .

It is an emirp because it is prime and its reverse (316621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126613 - 2¹ = 126611 is a prime.

Together with 126611, it forms a pair of twin primes.

It is an Ulam number.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126611) 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 as a sum of consecutive naturals, namely, 63306 + 63307.

It is an arithmetic number, because the mean of its divisors is an integer number (63307).

2¹²⁶⁶¹³ is an apocalyptic number.

It is an amenable number.

126613 is a deficient number, since it is larger than the sum of its proper divisors (1).

126613 is an equidigital number, since it uses as much as digits as its factorization.

126613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 126613 is about 355.8272052556. The cubic root of 126613 is about 50.2141481685.

The spelling of 126613 in words is "one hundred twenty-six thousand, six hundred thirteen".