126771013 has 2 divisors, whose sum is σ = 126771014. Its totient is φ = 126771012.

The previous prime is 126770957. The next prime is 126771037. The reversal of 126771013 is 310177621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122921569 + 3849444 = 11087^2 + 1962^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126771013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126771083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63385506 + 63385507.

It is an arithmetic number, because the mean of its divisors is an integer number (63385507).

Almost surely, 2^126771013 is an apocalyptic number.

It is an amenable number.

126771013 is a deficient number, since it is larger than the sum of its proper divisors (1).

126771013 is an equidigital number, since it uses as much as digits as its factorization.

126771013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 126771013 is about 11259.2634306157. The cubic root of 126771013 is about 502.3502856711.

The spelling of 126771013 in words is "one hundred twenty-six million, seven hundred seventy-one thousand, thirteen".