126805801 has 2 divisors, whose sum is σ = 126805802. Its totient is φ = 126805800.

The previous prime is 126805799. The next prime is 126805813. The reversal of 126805801 is 108508621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111408025 + 15397776 = 10555^2 + 3924^2 .

It is a cyclic number.

It is not a de Polignac number, because 126805801 - 2¹ = 126805799 is a prime.

It is a super-2 number, since 2×126805801² = 32159422334503202, which contains 22 as substring.

Together with 126805799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (126805871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63402900 + 63402901.

It is an arithmetic number, because the mean of its divisors is an integer number (63402901).

Almost surely, 2^126805801 is an apocalyptic number.

It is an amenable number.

126805801 is a deficient number, since it is larger than the sum of its proper divisors (1).

126805801 is an equidigital number, since it uses as much as digits as its factorization.

126805801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 126805801 is about 11260.8081859163. The cubic root of 126805801 is about 502.3962324613.

It can be divided in two parts, 12680 and 5801, that added together give a palindrome (18481).

The spelling of 126805801 in words is "one hundred twenty-six million, eight hundred five thousand, eight hundred one".