123512225 has 12 divisors (see below), whose sum is σ = 162164844. Its totient is φ = 92997120.

The previous prime is 123512219. The next prime is 123512227. The reversal of 123512225 is 522215321.

It can be written as a sum of positive squares in 6 ways, for example, as 13456 + 123498769 = 116^2 + 11113^2 .

It is not a de Polignac number, because 123512225 - 2⁶ = 123512161 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 123512225.

It is not an unprimeable number, because it can be changed into a prime (123512227) 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, 144884 + ... + 145733.

It is an arithmetic number, because the mean of its divisors is an integer number (13513737).

Almost surely, 2^123512225 is an apocalyptic number.

It is an amenable number.

123512225 is a deficient number, since it is larger than the sum of its proper divisors (38652619).

123512225 is a wasteful number, since it uses less digits than its factorization.

123512225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290644 (or 290639 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 123512225 is about 11113.6054005890. The cubic root of 123512225 is about 498.0083774121.

Adding to 123512225 its reverse (522215321), we get a palindrome (645727546).

The spelling of 123512225 in words is "one hundred twenty-three million, five hundred twelve thousand, two hundred twenty-five".