12022506 has 40 divisors (see below), whose sum is σ = 27529920. Its totient is φ = 3919752.

The previous prime is 12022487. The next prime is 12022511. The reversal of 12022506 is 60522021.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6825 + ... + 8403.

It is an arithmetic number, because the mean of its divisors is an integer number (688248).

Almost surely, 2^12022506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12022506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13764960).

12022506 is an abundant number, since it is smaller than the sum of its proper divisors (15507414).

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

12022506 is a wasteful number, since it uses less digits than its factorization.

12022506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 12022506 is about 3467.3485547317. The cubic root of 12022506 is about 229.0858865627.

Adding to 12022506 its reverse (60522021), we get a palindrome (72544527).

The spelling of 12022506 in words is "twelve million, twenty-two thousand, five hundred six".