128145425 has 12 divisors (see below), whose sum is σ = 159824220. Its totient is φ = 101920320.

The previous prime is 128145421. The next prime is 128145427. The reversal of 128145425 is 524541821.

It can be written as a sum of positive squares in 6 ways, for example, as 13719616 + 114425809 = 3704^2 + 10697^2 .

It is not a de Polignac number, because 128145425 - 2² = 128145421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128145391 and 128145400.

It is not an unprimeable number, because it can be changed into a prime (128145421) 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, 10490 + ... + 19139.

It is an arithmetic number, because the mean of its divisors is an integer number (13318685).

Almost surely, 2^128145425 is an apocalyptic number.

It is an amenable number.

128145425 is a deficient number, since it is larger than the sum of its proper divisors (31678795).

128145425 is a wasteful number, since it uses less digits than its factorization.

128145425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29812 (or 29807 counting only the distinct ones).

The product of its digits is 12800, while the sum is 32.

The square root of 128145425 is about 11320.1336122857. The cubic root of 128145425 is about 504.1592060762.

The spelling of 128145425 in words is "one hundred twenty-eight million, one hundred forty-five thousand, four hundred twenty-five".