12200000 has 84 divisors (see below), whose sum is σ = 30755844. Its totient is φ = 4800000.

The previous prime is 12199997. The next prime is 12200009. The reversal of 12200000 is 221.

It can be written as a sum of positive squares in 6 ways, for example, as 11999296 + 200704 = 3464^2 + 448^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is not an unprimeable number, because it can be changed into a prime (12200009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199970 + ... + 200030.

It is an arithmetic number, because the mean of its divisors is an integer number (366141).

Almost surely, 2^12200000 is an apocalyptic number.

12200000 is a gapful number since it is divisible by the number (10) 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 12200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15377922).

12200000 is an abundant number, since it is smaller than the sum of its proper divisors (18555844).

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

12200000 is an frugal number, since it uses more digits than its factorization.

12200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 12200000 is about 3492.8498393146. The cubic root of 12200000 is about 230.2077517963.

Adding to 12200000 its reverse (221), we get a palindrome (12200221).

The spelling of 12200000 in words is "twelve million, two hundred thousand".