1001003120 has 40 divisors (see below), whose sum is σ = 2506360416. Its totient is φ = 369600768.

The previous prime is 1001003119. The next prime is 1001003141. The reversal of 1001003120 is 213001001.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 1001003098 and 1001003107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480212 + ... + 482291.

Almost surely, 2^1001003120 is an apocalyptic number.

1001003120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001003120 is an abundant number, since it is smaller than the sum of its proper divisors (1505357296).

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

1001003120 is a wasteful number, since it uses less digits than its factorization.

1001003120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962529 (or 962523 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 1001003120 is about 31638.6333459585. The cubic root of 1001003120 is about 1000.3342615901.

Adding to 1001003120 its reverse (213001001), we get a palindrome (1214004121).

The spelling of 1001003120 in words is "one billion, one million, three thousand, one hundred twenty".