126509701 has 2 divisors, whose sum is σ = 126509702. Its totient is φ = 126509700.

The previous prime is 126509639. The next prime is 126509711. The reversal of 126509701 is 107905621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85562500 + 40947201 = 9250^2 + 6399^2 .

It is a cyclic number.

It is not a de Polignac number, because 126509701 - 2¹⁹ = 125985413 is a prime.

It is equal to p_7191193 and since 126509701 and 7191193 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126509711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63254850 + 63254851.

It is an arithmetic number, because the mean of its divisors is an integer number (63254851).

Almost surely, 2^126509701 is an apocalyptic number.

It is an amenable number.

126509701 is a deficient number, since it is larger than the sum of its proper divisors (1).

126509701 is an equidigital number, since it uses as much as digits as its factorization.

126509701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 126509701 is about 11247.6531329873. The cubic root of 126509701 is about 502.0048847956.

The spelling of 126509701 in words is "one hundred twenty-six million, five hundred nine thousand, seven hundred one".