1025025220 has 24 divisors (see below), whose sum is σ = 2168990208. Its totient is φ = 406879200.

The previous prime is 1025025191. The next prime is 1025025229. The reversal of 1025025220 is 225205201.

It is not an unprimeable number, because it can be changed into a prime (1025025229) by changing a digit.

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, 192996 + ... + 198235.

It is an arithmetic number, because the mean of its divisors is an integer number (90374592).

Almost surely, 2^1025025220 is an apocalyptic number.

1025025220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025025220 is an abundant number, since it is smaller than the sum of its proper divisors (1143964988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1025025220 is a wasteful number, since it uses less digits than its factorization.

1025025220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391371 (or 391369 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1025025220 is about 32016.0150549690. The cubic root of 1025025220 is about 1008.2731069524.

The spelling of 1025025220 in words is "one billion, twenty-five million, twenty-five thousand, two hundred twenty".