1000221250 has 40 divisors (see below), whose sum is σ = 2142664128. Its totient is φ = 342930000.

The previous prime is 1000221221. The next prime is 1000221251. The reversal of 1000221250 is 521220001.

1000221250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1000221250.

It is not an unprimeable number, because it can be changed into a prime (1000221251) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 48406 + ... + 65905.

Almost surely, 2^1000221250 is an apocalyptic number.

1000221250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000221250 is an abundant number, since it is smaller than the sum of its proper divisors (1142442878).

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

1000221250 is an equidigital number, since it uses as much as digits as its factorization.

1000221250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114340 (or 114325 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1000221250 is about 31626.2746778687. The cubic root of 1000221250 is about 1000.0737445616.

Adding to 1000221250 its reverse (521220001), we get a palindrome (1521441251).

The spelling of 1000221250 in words is "one billion, two hundred twenty-one thousand, two hundred fifty".