1025225521 has 8 divisors (see below), whose sum is σ = 1058872064. Its totient is φ = 991614960.

The previous prime is 1025225471. The next prime is 1025225549. The reversal of 1025225521 is 1255225201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1025225521 - 2²⁵ = 991671089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025225561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56635 + ... + 72511.

It is an arithmetic number, because the mean of its divisors is an integer number (132359008).

Almost surely, 2^1025225521 is an apocalyptic number.

It is an amenable number.

1025225521 is a deficient number, since it is larger than the sum of its proper divisors (33646543).

1025225521 is a wasteful number, since it uses less digits than its factorization.

1025225521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17991.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1025225521 is about 32019.1430397505. The cubic root of 1025225521 is about 1008.3387784936.

The spelling of 1025225521 in words is "one billion, twenty-five million, two hundred twenty-five thousand, five hundred twenty-one".