126781843 has 2 divisors, whose sum is σ = 126781844. Its totient is φ = 126781842.

The previous prime is 126781817. The next prime is 126781849. The reversal of 126781843 is 348187621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126781843 - 2⁹ = 126781331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126781796 and 126781805.

It is not a weakly prime, because it can be changed into another prime (126781849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63390921 + 63390922.

It is an arithmetic number, because the mean of its divisors is an integer number (63390922).

Almost surely, 2^126781843 is an apocalyptic number.

126781843 is a deficient number, since it is larger than the sum of its proper divisors (1).

126781843 is an equidigital number, since it uses as much as digits as its factorization.

126781843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 126781843 is about 11259.7443576664. The cubic root of 126781843 is about 502.3645904624.

The spelling of 126781843 in words is "one hundred twenty-six million, seven hundred eighty-one thousand, eight hundred forty-three".