125811143 has 2 divisors, whose sum is σ = 125811144. Its totient is φ = 125811142.

The previous prime is 125811139. The next prime is 125811157. The reversal of 125811143 is 341118521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125811143 - 2² = 125811139 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125811043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62905571 + 62905572.

It is an arithmetic number, because the mean of its divisors is an integer number (62905572).

Almost surely, 2^125811143 is an apocalyptic number.

125811143 is a deficient number, since it is larger than the sum of its proper divisors (1).

125811143 is an equidigital number, since it uses as much as digits as its factorization.

125811143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 26.

The square root of 125811143 is about 11216.5566463153. The cubic root of 125811143 is about 501.0791930090.

Adding to 125811143 its reverse (341118521), we get a palindrome (466929664).

The spelling of 125811143 in words is "one hundred twenty-five million, eight hundred eleven thousand, one hundred forty-three".