1525280225 has 12 divisors (see below), whose sum is σ = 2161540224. Its totient is φ = 1045906320.

The previous prime is 1525280209. The next prime is 1525280231. The reversal of 1525280225 is 5220825251.

It is not a de Polignac number, because 1525280225 - 2⁴ = 1525280209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1525280191 and 1525280200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4357769 + ... + 4358118.

It is an arithmetic number, because the mean of its divisors is an integer number (180128352).

Almost surely, 2^1525280225 is an apocalyptic number.

It is an amenable number.

1525280225 is a deficient number, since it is larger than the sum of its proper divisors (636259999).

1525280225 is an equidigital number, since it uses as much as digits as its factorization.

1525280225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8715904 (or 8715899 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 1525280225 is about 39054.8361281929. The cubic root of 1525280225 is about 1151.1092573601.

The spelling of 1525280225 in words is "one billion, five hundred twenty-five million, two hundred eighty thousand, two hundred twenty-five".