125811043 has 2 divisors, whose sum is σ = 125811044. Its totient is φ = 125811042.

The previous prime is 125811041. The next prime is 125811079. The reversal of 125811043 is 340118521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125811043 - 2¹ = 125811041 is a prime.

Together with 125811041, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 125810999 and 125811017.

It is not a weakly prime, because it can be changed into another prime (125811041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62905521 + 62905522.

It is an arithmetic number, because the mean of its divisors is an integer number (62905522).

Almost surely, 2^125811043 is an apocalyptic number.

125811043 is a deficient number, since it is larger than the sum of its proper divisors (1).

125811043 is an equidigital number, since it uses as much as digits as its factorization.

125811043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 125811043 is about 11216.5521886184. The cubic root of 125811043 is about 501.0790602494.

Adding to 125811043 its reverse (340118521), we get a palindrome (465929564).

The spelling of 125811043 in words is "one hundred twenty-five million, eight hundred eleven thousand, forty-three".