123440225 has 12 divisors (see below), whose sum is σ = 153252096. Its totient is φ = 98632080.

The previous prime is 123440167. The next prime is 123440227. The reversal of 123440225 is 522044321.

It is a happy number.

It is not a de Polignac number, because 123440225 - 2¹⁰ = 123439201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123440225.

It is not an unprimeable number, because it can be changed into a prime (123440227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22064 + ... + 27086.

It is an arithmetic number, because the mean of its divisors is an integer number (12771008).

Almost surely, 2^123440225 is an apocalyptic number.

It is an amenable number.

123440225 is a deficient number, since it is larger than the sum of its proper divisors (29811871).

123440225 is an equidigital number, since it uses as much as digits as its factorization.

123440225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6016 (or 6011 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 123440225 is about 11110.3656555489. The cubic root of 123440225 is about 497.9115892256.

Adding to 123440225 its reverse (522044321), we get a palindrome (645484546).

The spelling of 123440225 in words is "one hundred twenty-three million, four hundred forty thousand, two hundred twenty-five".