125711805 has 8 divisors (see below), whose sum is σ = 201138912. Its totient is φ = 67046288.

The previous prime is 125711801. The next prime is 125711857. The reversal of 125711805 is 508117521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125711805 - 2² = 125711801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125711801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4190379 + ... + 4190408.

It is an arithmetic number, because the mean of its divisors is an integer number (25142364).

Almost surely, 2^125711805 is an apocalyptic number.

125711805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125711805 is a deficient number, since it is larger than the sum of its proper divisors (75427107).

125711805 is an equidigital number, since it uses as much as digits as its factorization.

125711805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8380795.

The product of its (nonzero) digits is 2800, while the sum is 30.

The square root of 125711805 is about 11212.1275857885. The cubic root of 125711805 is about 500.9472775305.

The spelling of 125711805 in words is "one hundred twenty-five million, seven hundred eleven thousand, eight hundred five".