125047909 has 12 divisors (see below), whose sum is σ = 146496352. Its totient is φ = 104559840.

The previous prime is 125047889. The next prime is 125047921. The reversal of 125047909 is 909740521.

It is a de Polignac number, because none of the positive numbers 2^k-125047909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125047009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6454 + ... + 17080.

Almost surely, 2^125047909 is an apocalyptic number.

It is an amenable number.

125047909 is a deficient number, since it is larger than the sum of its proper divisors (21448443).

125047909 is an equidigital number, since it uses as much as digits as its factorization.

125047909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10716 (or 10675 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 125047909 is about 11182.4822378576. The cubic root of 125047909 is about 500.0638705074.

The spelling of 125047909 in words is "one hundred twenty-five million, forty-seven thousand, nine hundred nine".