125440065 has 12 divisors (see below), whose sum is σ = 217429524. Its totient is φ = 66901344.

The previous prime is 125440009. The next prime is 125440069. The reversal of 125440065 is 560044521.

125440065 is a `hidden beast` number, since 1 + 254 + 400 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40947201 + 84492864 = 6399^2 + 9192^2 .

It is not a de Polignac number, because 125440065 - 2⁶ = 125440001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125440069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1393734 + ... + 1393823.

It is an arithmetic number, because the mean of its divisors is an integer number (18119127).

Almost surely, 2^125440065 is an apocalyptic number.

125440065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125440065 is a deficient number, since it is larger than the sum of its proper divisors (91989459).

125440065 is a wasteful number, since it uses less digits than its factorization.

125440065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787568 (or 2787565 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 125440065 is about 11200.0029017853. The cubic root of 125440065 is about 500.5860661179.

Adding to 125440065 its reverse (560044521), we get a palindrome (685484586).

The spelling of 125440065 in words is "one hundred twenty-five million, four hundred forty thousand, sixty-five".