126720313 has 2 divisors, whose sum is σ = 126720314. Its totient is φ = 126720312.

The previous prime is 126720277. The next prime is 126720359. The reversal of 126720313 is 313027621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92987449 + 33732864 = 9643^2 + 5808^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126720313 is a prime.

It is not a weakly prime, because it can be changed into another prime (126721313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63360156 + 63360157.

It is an arithmetic number, because the mean of its divisors is an integer number (63360157).

Almost surely, 2^126720313 is an apocalyptic number.

It is an amenable number.

126720313 is a deficient number, since it is larger than the sum of its proper divisors (1).

126720313 is an equidigital number, since it uses as much as digits as its factorization.

126720313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 126720313 is about 11257.0117260310. The cubic root of 126720313 is about 502.2833078056.

Adding to 126720313 its reverse (313027621), we get a palindrome (439747934).

The spelling of 126720313 in words is "one hundred twenty-six million, seven hundred twenty thousand, three hundred thirteen".