1000113521 has 12 divisors (see below), whose sum is σ = 1102663632. Its totient is φ = 906411000.

The previous prime is 1000113497. The next prime is 1000113529. The reversal of 1000113521 is 1253110001.

It is a de Polignac number, because none of the positive numbers 2^k-1000113521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000113496 and 1000113505.

It is not an unprimeable number, because it can be changed into a prime (1000113529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27566 + ... + 52536.

It is an arithmetic number, because the mean of its divisors is an integer number (91888636).

Almost surely, 2^1000113521 is an apocalyptic number.

1000113521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1000113521 is a deficient number, since it is larger than the sum of its proper divisors (102550111).

1000113521 is a wasteful number, since it uses less digits than its factorization.

1000113521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25324 (or 25313 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 1000113521 is about 31624.5714753576. The cubic root of 1000113521 is about 1000.0378389015.

Adding to 1000113521 its reverse (1253110001), we get a palindrome (2253223522).

The spelling of 1000113521 in words is "one billion, one hundred thirteen thousand, five hundred twenty-one".