11145520 has 40 divisors (see below), whose sum is σ = 26141184. Its totient is φ = 4419072.

The previous prime is 11145503. The next prime is 11145521. The reversal of 11145520 is 2554111.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (11145521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9612 + ... + 10708.

Almost surely, 2^11145520 is an apocalyptic number.

11145520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11145520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13070592).

11145520 is an abundant number, since it is smaller than the sum of its proper divisors (14995664).

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

11145520 is a wasteful number, since it uses less digits than its factorization.

11145520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237 (or 1231 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 11145520 is about 3338.4906769377. The cubic root of 11145520 is about 223.3744237654.

Adding to 11145520 its reverse (2554111), we get a palindrome (13699631).

The spelling of 11145520 in words is "eleven million, one hundred forty-five thousand, five hundred twenty".