126520741 has 2 divisors, whose sum is σ = 126520742. Its totient is φ = 126520740.

The previous prime is 126520739. The next prime is 126520777. The reversal of 126520741 is 147025621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93412225 + 33108516 = 9665^2 + 5754^2 .

It is a cyclic number.

It is not a de Polignac number, because 126520741 - 2¹ = 126520739 is a prime.

Together with 126520739, 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 (126520841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63260370 + 63260371.

It is an arithmetic number, because the mean of its divisors is an integer number (63260371).

Almost surely, 2^126520741 is an apocalyptic number.

It is an amenable number.

126520741 is a deficient number, since it is larger than the sum of its proper divisors (1).

126520741 is an equidigital number, since it uses as much as digits as its factorization.

126520741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 126520741 is about 11248.1438913271. The cubic root of 126520741 is about 502.0194870294.

The spelling of 126520741 in words is "one hundred twenty-six million, five hundred twenty thousand, seven hundred forty-one".