123147225 has 18 divisors (see below), whose sum is σ = 220570766. Its totient is φ = 65678400.

The previous prime is 123147197. The next prime is 123147229. The reversal of 123147225 is 522741321.

It can be written as a sum of positive squares in 3 ways, for example, as 32764176 + 90383049 = 5724^2 + 9507^2 .

It is not a de Polignac number, because 123147225 - 2¹⁶ = 123081689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123147229) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 273436 + ... + 273885.

Almost surely, 2^123147225 is an apocalyptic number.

123147225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123147225 is a deficient number, since it is larger than the sum of its proper divisors (97423541).

123147225 is a wasteful number, since it uses less digits than its factorization.

123147225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547337 (or 547329 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 123147225 is about 11097.1719370297. The cubic root of 123147225 is about 497.5173264001.

Adding to 123147225 its reverse (522741321), we get a palindrome (645888546).

The spelling of 123147225 in words is "one hundred twenty-three million, one hundred forty-seven thousand, two hundred twenty-five".