125476991 has 2 divisors, whose sum is σ = 125476992. Its totient is φ = 125476990.

The previous prime is 125476987. The next prime is 125477039. The reversal of 125476991 is 199674521.

It is a weak prime.

It is an emirp because it is prime and its reverse (199674521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125476991 - 2² = 125476987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125476921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62738495 + 62738496.

It is an arithmetic number, because the mean of its divisors is an integer number (62738496).

Almost surely, 2^125476991 is an apocalyptic number.

125476991 is a deficient number, since it is larger than the sum of its proper divisors (1).

125476991 is an equidigital number, since it uses as much as digits as its factorization.

125476991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 125476991 is about 11201.6512622024. The cubic root of 125476991 is about 500.6351807491.

The spelling of 125476991 in words is "one hundred twenty-five million, four hundred seventy-six thousand, nine hundred ninety-one".