125711917 has 4 divisors (see below), whose sum is σ = 125738080. Its totient is φ = 125685756.

The previous prime is 125711909. The next prime is 125711939. The reversal of 125711917 is 719117521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 719117521 = 137 ⋅5249033.

It is a cyclic number.

It is not a de Polignac number, because 125711917 - 2³ = 125711909 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 (125711947) 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 in 3 ways as a sum of consecutive naturals, for example, 3567 + ... + 16252.

It is an arithmetic number, because the mean of its divisors is an integer number (31434520).

Almost surely, 2^125711917 is an apocalyptic number.

It is an amenable number.

125711917 is a deficient number, since it is larger than the sum of its proper divisors (26163).

125711917 is an equidigital number, since it uses as much as digits as its factorization.

125711917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26162.

The product of its digits is 4410, while the sum is 34.

The square root of 125711917 is about 11212.1325803792. The cubic root of 125711917 is about 500.9474262996.

The spelling of 125711917 in words is "one hundred twenty-five million, seven hundred eleven thousand, nine hundred seventeen".