126021317 has 2 divisors, whose sum is σ = 126021318. Its totient is φ = 126021316.

The previous prime is 126021277. The next prime is 126021359. The reversal of 126021317 is 713120621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108035236 + 17986081 = 10394^2 + 4241^2 .

It is a cyclic number.

It is not a de Polignac number, because 126021317 - 2⁸ = 126021061 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 126021292 and 126021301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126021377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63010658 + 63010659.

It is an arithmetic number, because the mean of its divisors is an integer number (63010659).

Almost surely, 2^126021317 is an apocalyptic number.

It is an amenable number.

126021317 is a deficient number, since it is larger than the sum of its proper divisors (1).

126021317 is an equidigital number, since it uses as much as digits as its factorization.

126021317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 126021317 is about 11225.9216548130. The cubic root of 126021317 is about 501.3580639848.

Adding to 126021317 its reverse (713120621), we get a palindrome (839141938).

The spelling of 126021317 in words is "one hundred twenty-six million, twenty-one thousand, three hundred seventeen".