125440225 has 12 divisors (see below), whose sum is σ = 160910460. Its totient is φ = 96891200.

The previous prime is 125440201. The next prime is 125440277. The reversal of 125440225 is 522044521.

It can be written as a sum of positive squares in 6 ways, for example, as 1763584 + 123676641 = 1328^2 + 11121^2 .

It is not a de Polignac number, because 125440225 - 2⁷ = 125440097 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 125440225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85786 + ... + 87235.

It is an arithmetic number, because the mean of its divisors is an integer number (13409205).

Almost surely, 2^125440225 is an apocalyptic number.

It is an amenable number.

125440225 is a deficient number, since it is larger than the sum of its proper divisors (35470235).

125440225 is a wasteful number, since it uses less digits than its factorization.

125440225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173060 (or 173055 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 125440225 is about 11200.0100446384. The cubic root of 125440225 is about 500.5862789520.

Adding to 125440225 its reverse (522044521), we get a palindrome (647484746).

The spelling of 125440225 in words is "one hundred twenty-five million, four hundred forty thousand, two hundred twenty-five".