11172520 has 32 divisors (see below), whose sum is σ = 25821000. Its totient is φ = 4347648.

The previous prime is 11172481. The next prime is 11172527. The reversal of 11172520 is 2527111.

11172520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11142244 + 30276 = 3338^2 + 174^2 .

It is not an unprimeable number, because it can be changed into a prime (11172527) 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, 2295 + ... + 5254.

Almost surely, 2^11172520 is an apocalyptic number.

11172520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11172520 is an abundant number, since it is smaller than the sum of its proper divisors (14648480).

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

11172520 is a wasteful number, since it uses less digits than its factorization.

11172520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7597 (or 7593 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 11172520 is about 3342.5319744170. The cubic root of 11172520 is about 223.5546530075.

Adding to 11172520 its reverse (2527111), we get a palindrome (13699631).

The spelling of 11172520 in words is "eleven million, one hundred seventy-two thousand, five hundred twenty".