103128325 has 12 divisors (see below), whose sum is σ = 130999428. Its totient is φ = 80489600.

The previous prime is 103128323. The next prime is 103128329. The reversal of 103128325 is 523821301.

It can be written as a sum of positive squares in 6 ways, for example, as 11600836 + 91527489 = 3406^2 + 9567^2 .

It is not a de Polignac number, because 103128325 - 2¹ = 103128323 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 103128325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103128323) 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, 49282 + ... + 51331.

It is an arithmetic number, because the mean of its divisors is an integer number (10916619).

Almost surely, 2^103128325 is an apocalyptic number.

It is an amenable number.

103128325 is a deficient number, since it is larger than the sum of its proper divisors (27871103).

103128325 is a wasteful number, since it uses less digits than its factorization.

103128325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100664 (or 100659 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 103128325 is about 10155.2117161584. The cubic root of 103128325 is about 468.9494037553.

Adding to 103128325 its reverse (523821301), we get a palindrome (626949626).

The spelling of 103128325 in words is "one hundred three million, one hundred twenty-eight thousand, three hundred twenty-five".