125640025 has 24 divisors (see below), whose sum is σ = 178649280. Its totient is φ = 85863360.

The previous prime is 125640017. The next prime is 125640029. The reversal of 125640025 is 520046521.

It is not a de Polignac number, because 125640025 - 2³ = 125640017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (125640029) 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 23 ways as a sum of consecutive naturals, for example, 59691 + ... + 61759.

It is an arithmetic number, because the mean of its divisors is an integer number (7443720).

Almost surely, 2^125640025 is an apocalyptic number.

It is an amenable number.

125640025 is a deficient number, since it is larger than the sum of its proper divisors (53009255).

125640025 is a wasteful number, since it uses less digits than its factorization.

125640025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433 (or 2428 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 125640025 is about 11208.9261305444. The cubic root of 125640025 is about 500.8519143262.

Adding to 125640025 its reverse (520046521), we get a palindrome (645686546).

The spelling of 125640025 in words is "one hundred twenty-five million, six hundred forty thousand, twenty-five".