1001105720 has 16 divisors (see below), whose sum is σ = 2252487960. Its totient is φ = 400442272.

The previous prime is 1001105701. The next prime is 1001105737. The reversal of 1001105720 is 275011001.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 12513782 + ... + 12513861.

Almost surely, 2^1001105720 is an apocalyptic number.

1001105720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001105720 is an abundant number, since it is smaller than the sum of its proper divisors (1251382240).

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

1001105720 is a wasteful number, since it uses less digits than its factorization.

1001105720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25027654 (or 25027650 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 1001105720 is about 31640.2547398089. The cubic root of 1001105720 is about 1000.3684375704.

Adding to 1001105720 its reverse (275011001), we get a palindrome (1276116721).

The spelling of 1001105720 in words is "one billion, one million, one hundred five thousand, seven hundred twenty".