125771791 has 2 divisors, whose sum is σ = 125771792. Its totient is φ = 125771790.

The previous prime is 125771761. The next prime is 125771819. The reversal of 125771791 is 197177521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125771791 - 2²³ = 117383183 is a prime.

It is a super-2 number, since 2×125771791² = 31637086822695362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125771761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62885895 + 62885896.

It is an arithmetic number, because the mean of its divisors is an integer number (62885896).

Almost surely, 2^125771791 is an apocalyptic number.

125771791 is a deficient number, since it is larger than the sum of its proper divisors (1).

125771791 is an equidigital number, since it uses as much as digits as its factorization.

125771791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30870, while the sum is 40.

The square root of 125771791 is about 11214.8023165814. The cubic root of 125771791 is about 501.0269439947.

The spelling of 125771791 in words is "one hundred twenty-five million, seven hundred seventy-one thousand, seven hundred ninety-one".