126940217 has 2 divisors, whose sum is σ = 126940218. Its totient is φ = 126940216.

The previous prime is 126940213. The next prime is 126940237. The reversal of 126940217 is 712049621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126585001 + 355216 = 11251^2 + 596^2 .

It is a cyclic number.

It is not a de Polignac number, because 126940217 - 2² = 126940213 is a prime.

It is a super-2 number, since 2×126940217² = 32227637384014178, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126940213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63470108 + 63470109.

It is an arithmetic number, because the mean of its divisors is an integer number (63470109).

Almost surely, 2^126940217 is an apocalyptic number.

It is an amenable number.

126940217 is a deficient number, since it is larger than the sum of its proper divisors (1).

126940217 is an equidigital number, since it uses as much as digits as its factorization.

126940217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 126940217 is about 11266.7749156535. The cubic root of 126940217 is about 502.5736855550.

Adding to 126940217 its reverse (712049621), we get a palindrome (838989838).

The spelling of 126940217 in words is "one hundred twenty-six million, nine hundred forty thousand, two hundred seventeen".