1001003325 has 24 divisors (see below), whose sum is σ = 1891420608. Its totient is φ = 457601280.

The previous prime is 1001003287. The next prime is 1001003327. The reversal of 1001003325 is 5233001001.

It is a happy number.

It is not a de Polignac number, because 1001003325 - 2⁶ = 1001003261 is a prime.

It is a super-2 number, since 2×1001003325² = 2004015313322111250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001003327) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 952812 + ... + 953861.

It is an arithmetic number, because the mean of its divisors is an integer number (78809192).

Almost surely, 2^1001003325 is an apocalyptic number.

1001003325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1001003325 is a deficient number, since it is larger than the sum of its proper divisors (890417283).

1001003325 is a wasteful number, since it uses less digits than its factorization.

1001003325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906693 (or 1906688 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1001003325 is about 31638.6365856685. The cubic root of 1001003325 is about 1000.3343298777.

Adding to 1001003325 its reverse (5233001001), we get a palindrome (6234004326).

The spelling of 1001003325 in words is "one billion, one million, three thousand, three hundred twenty-five".