125831047 has 2 divisors, whose sum is σ = 125831048. Its totient is φ = 125831046.

The previous prime is 125831039. The next prime is 125831113. The reversal of 125831047 is 740138521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125831047 - 2³ = 125831039 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125831347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62915523 + 62915524.

It is an arithmetic number, because the mean of its divisors is an integer number (62915524).

Almost surely, 2^125831047 is an apocalyptic number.

125831047 is a deficient number, since it is larger than the sum of its proper divisors (1).

125831047 is an equidigital number, since it uses as much as digits as its factorization.

125831047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 125831047 is about 11217.4438710430. The cubic root of 125831047 is about 501.1056160908.

Adding to 125831047 its reverse (740138521), we get a palindrome (865969568).

The spelling of 125831047 in words is "one hundred twenty-five million, eight hundred thirty-one thousand, forty-seven".