1000225644 has 24 divisors (see below), whose sum is σ = 2546029248. Its totient is φ = 303098640.

The previous prime is 1000225619. The next prime is 1000225657. The reversal of 1000225644 is 4465220001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3788602 + ... + 3788865.

It is an arithmetic number, because the mean of its divisors is an integer number (106084552).

Almost surely, 2^1000225644 is an apocalyptic number.

It is an amenable number.

1000225644 is an abundant number, since it is smaller than the sum of its proper divisors (1545803604).

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

1000225644 is a wasteful number, since it uses less digits than its factorization.

1000225644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7577485 (or 7577483 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1000225644 is about 31626.3441453482. The cubic root of 1000225644 is about 1000.0752090101.

Adding to 1000225644 its reverse (4465220001), we get a palindrome (5465445645).

The spelling of 1000225644 in words is "one billion, two hundred twenty-five thousand, six hundred forty-four".