125557065 has 12 divisors (see below), whose sum is σ = 217632324. Its totient is φ = 66963744.

The previous prime is 125557057. The next prime is 125557079. The reversal of 125557065 is 560755521.

It is a happy number.

125557065 is a `hidden beast` number, since 1 + 25 + 5 + 570 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33454656 + 92102409 = 5784^2 + 9597^2 .

It is not a de Polignac number, because 125557065 - 2³ = 125557057 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1395034 + ... + 1395123.

It is an arithmetic number, because the mean of its divisors is an integer number (18136027).

Almost surely, 2^125557065 is an apocalyptic number.

125557065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125557065 is a deficient number, since it is larger than the sum of its proper divisors (92075259).

125557065 is a wasteful number, since it uses less digits than its factorization.

125557065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2790168 (or 2790165 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 36.

The square root of 125557065 is about 11205.2248973414. The cubic root of 125557065 is about 500.7416526920.

The spelling of 125557065 in words is "one hundred twenty-five million, five hundred fifty-seven thousand, sixty-five".