12051522 has 48 divisors (see below), whose sum is σ = 30169152. Its totient is φ = 3405600.

The previous prime is 12051509. The next prime is 12051541. The reversal of 12051522 is 22515021.

12051522 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 12051495 and 12051504.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12253 + ... + 13199.

It is an arithmetic number, because the mean of its divisors is an integer number (628524).

Almost surely, 2^12051522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12051522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15084576).

12051522 is an abundant number, since it is smaller than the sum of its proper divisors (18117630).

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

12051522 is a wasteful number, since it uses less digits than its factorization.

12051522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063 (or 1060 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 12051522 is about 3471.5302101523. The cubic root of 12051522 is about 229.2700360699.

Adding to 12051522 its reverse (22515021), we get a palindrome (34566543).

The spelling of 12051522 in words is "twelve million, fifty-one thousand, five hundred twenty-two".