1328125025 has 6 divisors (see below), whose sum is σ = 1646875062. Its totient is φ = 1062500000.

The previous prime is 1328125021. The next prime is 1328125037. The reversal of 1328125025 is 5205218231.

It can be written as a sum of positive squares in 3 ways, for example, as 11015761 + 1317109264 = 3319^2 + 36292^2 .

It is not a de Polignac number, because 1328125025 - 2² = 1328125021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1328125021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26562476 + ... + 26562525.

It is an arithmetic number, because the mean of its divisors is an integer number (274479177).

Almost surely, 2^1328125025 is an apocalyptic number.

It is an amenable number.

1328125025 is a deficient number, since it is larger than the sum of its proper divisors (318750037).

1328125025 is an equidigital number, since it uses as much as digits as its factorization.

1328125025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53125011 (or 53125006 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1328125025 is about 36443.4496857803. The cubic root of 1328125025 is about 1099.2074249365.

The spelling of 1328125025 in words is "one billion, three hundred twenty-eight million, one hundred twenty-five thousand, twenty-five".