11509012 has 12 divisors (see below), whose sum is σ = 20482560. Its totient is φ = 5656856.

The previous prime is 11509009. The next prime is 11509013. The reversal of 11509012 is 21090511.

It is a super-2 number, since 2×11509012² = 264914714432288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11509013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24148 + ... + 24619.

It is an arithmetic number, because the mean of its divisors is an integer number (1706880).

Almost surely, 2^11509012 is an apocalyptic number.

It is an amenable number.

11509012 is a deficient number, since it is larger than the sum of its proper divisors (8973548).

11509012 is a wasteful number, since it uses less digits than its factorization.

11509012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48830 (or 48828 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 11509012 is about 3392.4934782546. The cubic root of 11509012 is about 225.7768178123.

Adding to 11509012 its reverse (21090511), we get a palindrome (32599523).

The spelling of 11509012 in words is "eleven million, five hundred nine thousand, twelve".