125642225 has 12 divisors (see below), whose sum is σ = 160823040. Its totient is φ = 97270800.

The previous prime is 125642213. The next prime is 125642227. The reversal of 125642225 is 522246521.

It is a de Polignac number, because none of the positive numbers 2^k-125642225 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (125642227) 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 11 ways as a sum of consecutive naturals, for example, 80285 + ... + 81834.

It is an arithmetic number, because the mean of its divisors is an integer number (13401920).

Almost surely, 2^125642225 is an apocalyptic number.

It is an amenable number.

125642225 is a deficient number, since it is larger than the sum of its proper divisors (35180815).

125642225 is a wasteful number, since it uses less digits than its factorization.

125642225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162160 (or 162155 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 125642225 is about 11209.0242661884. The cubic root of 125642225 is about 500.8548376722.

Adding to 125642225 its reverse (522246521), we get a palindrome (647888746).

The spelling of 125642225 in words is "one hundred twenty-five million, six hundred forty-two thousand, two hundred twenty-five".