11520015 has 16 divisors (see below), whose sum is σ = 19850208. Its totient is φ = 5671296.

The previous prime is 11520013. The next prime is 11520031. The reversal of 11520015 is 51002511.

It is not a de Polignac number, because 11520015 - 2¹ = 11520013 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 11519976 and 11520003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11520013) 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 15 ways as a sum of consecutive naturals, for example, 29344 + ... + 29733.

It is an arithmetic number, because the mean of its divisors is an integer number (1240638).

Almost surely, 2^11520015 is an apocalyptic number.

11520015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11520015 is a deficient number, since it is larger than the sum of its proper divisors (8330193).

11520015 is a wasteful number, since it uses less digits than its factorization.

11520015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59098.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 11520015 is about 3394.1147594034. The cubic root of 11520015 is about 225.8487449560.

Adding to 11520015 its reverse (51002511), we get a palindrome (62522526).

It can be divided in two parts, 115200 and 15, that multiplied together give a cube (1728000 = 120³).

The spelling of 11520015 in words is "eleven million, five hundred twenty thousand, fifteen".