11506212 has 60 divisors (see below), whose sum is σ = 31864140. Its totient is φ = 3608064.

The previous prime is 11506171. The next prime is 11506213. The reversal of 11506212 is 21260511.

It can be written as a sum of positive squares in 2 ways, for example, as 9585216 + 1920996 = 3096^2 + 1386^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11506213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4464 + ... + 6552.

It is an arithmetic number, because the mean of its divisors is an integer number (531069).

Almost surely, 2^11506212 is an apocalyptic number.

11506212 is a gapful number since it is divisible by the number (12) 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 11506212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15932070).

11506212 is an abundant number, since it is smaller than the sum of its proper divisors (20357928).

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

11506212 is a wasteful number, since it uses less digits than its factorization.

11506212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122 (or 2111 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 11506212 is about 3392.0807773401. The cubic root of 11506212 is about 225.7585067599.

Adding to 11506212 its reverse (21260511), we get a palindrome (32766723).

The spelling of 11506212 in words is "eleven million, five hundred six thousand, two hundred twelve".