1025521285 has 8 divisors (see below), whose sum is σ = 1232725536. Its totient is φ = 819017040.

The previous prime is 1025521271. The next prime is 1025521313. The reversal of 1025521285 is 5821255201.

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

It is not a de Polignac number, because 1025521285 - 2⁹ = 1025520773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171771 + ... + 177640.

It is an arithmetic number, because the mean of its divisors is an integer number (154090692).

Almost surely, 2^1025521285 is an apocalyptic number.

It is an amenable number.

1025521285 is a deficient number, since it is larger than the sum of its proper divisors (207204251).

1025521285 is an equidigital number, since it uses as much as digits as its factorization.

1025521285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350003.

The product of its (nonzero) digits is 8000, while the sum is 31.

The square root of 1025521285 is about 32023.7612562922. The cubic root of 1025521285 is about 1008.4357333035.

Adding to 1025521285 its reverse (5821255201), we get a palindrome (6846776486).

The spelling of 1025521285 in words is "one billion, twenty-five million, five hundred twenty-one thousand, two hundred eighty-five".