1001225250 has 96 divisors (see below), whose sum is σ = 2716846704. Its totient is φ = 266054400.

The previous prime is 1001225231. The next prime is 1001225297. The reversal of 1001225250 is 525221001.

It can be written as a sum of positive squares in 8 ways, for example, as 42889401 + 958335849 = 6549^2 + 30957^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 838654 + ... + 839846.

Almost surely, 2^1001225250 is an apocalyptic number.

1001225250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1001225250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1358423352).

1001225250 is an abundant number, since it is smaller than the sum of its proper divisors (1715621454).

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

1001225250 is a wasteful number, since it uses less digits than its factorization.

1001225250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589 (or 1576 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1001225250 is about 31642.1435746695. The cubic root of 1001225250 is about 1000.4082499759.

Adding to 1001225250 its reverse (525221001), we get a palindrome (1526446251).

The spelling of 1001225250 in words is "one billion, one million, two hundred twenty-five thousand, two hundred fifty".