125505071 has 4 divisors (see below), whose sum is σ = 125611992. Its totient is φ = 125398152.

The previous prime is 125505049. The next prime is 125505077. The reversal of 125505071 is 170505521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125505071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125505071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125505077) 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, 51680 + ... + 54053.

It is an arithmetic number, because the mean of its divisors is an integer number (31402998).

Almost surely, 2^125505071 is an apocalyptic number.

125505071 is a deficient number, since it is larger than the sum of its proper divisors (106921).

125505071 is a wasteful number, since it uses less digits than its factorization.

125505071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106920.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 125505071 is about 11202.9045787242. The cubic root of 125505071 is about 500.6725230200.

The spelling of 125505071 in words is "one hundred twenty-five million, five hundred five thousand, seventy-one".