125642065 has 16 divisors (see below), whose sum is σ = 158922000. Its totient is φ = 95210752.

The previous prime is 125642059. The next prime is 125642113. The reversal of 125642065 is 560246521.

It can be written as a sum of positive squares in 8 ways, for example, as 2143296 + 123498769 = 1464^2 + 11113^2 .

It is a cyclic number.

It is not a de Polignac number, because 125642065 - 2³ = 125642057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 490 + ... + 15859.

It is an arithmetic number, because the mean of its divisors is an integer number (9932625).

Almost surely, 2^125642065 is an apocalyptic number.

It is an amenable number.

125642065 is a deficient number, since it is larger than the sum of its proper divisors (33279935).

125642065 is a wasteful number, since it uses less digits than its factorization.

125642065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16436.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 125642065 is about 11209.0171290796. The cubic root of 125642065 is about 500.8546250664.

Adding to 125642065 its reverse (560246521), we get a palindrome (685888586).

The spelling of 125642065 in words is "one hundred twenty-five million, six hundred forty-two thousand, sixty-five".