11520155 has 16 divisors (see below), whose sum is σ = 14222304. Its totient is φ = 8954880.

The previous prime is 11520083. The next prime is 11520191. The reversal of 11520155 is 55102511.

It is a happy number.

It is not a de Polignac number, because 11520155 - 2⁸ = 11519899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32459 + ... + 32811.

It is an arithmetic number, because the mean of its divisors is an integer number (888894).

Almost surely, 2^11520155 is an apocalyptic number.

11520155 is a deficient number, since it is larger than the sum of its proper divisors (2702149).

11520155 is a wasteful number, since it uses less digits than its factorization.

11520155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 11520155 is about 3394.1353832751. The cubic root of 11520155 is about 225.8496598476.

Adding to 11520155 its reverse (55102511), we get a palindrome (66622666).

The spelling of 11520155 in words is "eleven million, five hundred twenty thousand, one hundred fifty-five".