12081522 has 16 divisors (see below), whose sum is σ = 24220800. Its totient is φ = 4017552.

The previous prime is 12081497. The next prime is 12081523. The reversal of 12081522 is 22518021.

It is a happy number.

12081522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12081523) 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, 604 + ... + 4952.

It is an arithmetic number, because the mean of its divisors is an integer number (1513800).

Almost surely, 2^12081522 is an apocalyptic number.

12081522 is an abundant number, since it is smaller than the sum of its proper divisors (12139278).

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

12081522 is a wasteful number, since it uses less digits than its factorization.

12081522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4817.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 12081522 is about 3475.8483856463. The cubic root of 12081522 is about 229.4601199922.

Adding to 12081522 its reverse (22518021), we get a palindrome (34599543).

The spelling of 12081522 in words is "twelve million, eighty-one thousand, five hundred twenty-two".