126397 has 2 divisors, whose sum is σ = 126398. Its totient is φ = 126396.

The previous prime is 126359. The next prime is 126421. The reversal of 126397 is 793621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93636 + 32761 = 306^2 + 181^2 .

It is an emirp because it is prime and its reverse (793621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126397 - 2¹¹ = 124349 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126307) 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, 63198 + 63199.

It is an arithmetic number, because the mean of its divisors is an integer number (63199).

126397 is a Friedman number, since it can be written as 12*9^3+7^6, using all its digits and the basic arithmetic operations.

2¹²⁶³⁹⁷ is an apocalyptic number.

It is an amenable number.

126397 is a deficient number, since it is larger than the sum of its proper divisors (1).

126397 is an equidigital number, since it uses as much as digits as its factorization.

126397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 28.

The square root of 126397 is about 355.5235575880. The cubic root of 126397 is about 50.1855770378.

The spelling of 126397 in words is "one hundred twenty-six thousand, three hundred ninety-seven".