126886517 has 2 divisors, whose sum is σ = 126886518. Its totient is φ = 126886516.

The previous prime is 126886471. The next prime is 126886519. The reversal of 126886517 is 715688621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68989636 + 57896881 = 8306^2 + 7609^2 .

It is a cyclic number.

It is not a de Polignac number, because 126886517 - 2⁸ = 126886261 is a prime.

It is a super-2 number, since 2×126886517² = 32200376392782578, which contains 22 as substring.

Together with 126886519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126886519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63443258 + 63443259.

It is an arithmetic number, because the mean of its divisors is an integer number (63443259).

Almost surely, 2^126886517 is an apocalyptic number.

It is an amenable number.

126886517 is a deficient number, since it is larger than the sum of its proper divisors (1).

126886517 is an equidigital number, since it uses as much as digits as its factorization.

126886517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 44.

The square root of 126886517 is about 11264.3915503679. The cubic root of 126886517 is about 502.5028070105.

The spelling of 126886517 in words is "one hundred twenty-six million, eight hundred eighty-six thousand, five hundred seventeen".