123312625 has 16 divisors (see below), whose sum is σ = 157654224. Its totient is φ = 96240000.

The previous prime is 123312583. The next prime is 123312643. The reversal of 123312625 is 526213321.

It can be written as a sum of positive squares in 8 ways, for example, as 31899904 + 91412721 = 5648^2 + 9561^2 .

It is not a de Polignac number, because 123312625 - 2⁹ = 123312113 is a prime.

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

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 123312625.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6906 + ... + 17155.

It is an arithmetic number, because the mean of its divisors is an integer number (9853389).

Almost surely, 2^123312625 is an apocalyptic number.

It is an amenable number.

123312625 is a deficient number, since it is larger than the sum of its proper divisors (34341599).

123312625 is an equidigital number, since it uses as much as digits as its factorization.

123312625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24117 (or 24107 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 123312625 is about 11104.6217855450. The cubic root of 123312625 is about 497.7399665559.

Adding to 123312625 its reverse (526213321), we get a palindrome (649525946).

The spelling of 123312625 in words is "one hundred twenty-three million, three hundred twelve thousand, six hundred twenty-five".