12122240 has 128 divisors (see below), whose sum is σ = 32901120. Its totient is φ = 4239360.

The previous prime is 12122239. The next prime is 12122249. The reversal of 12122240 is 4222121.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (12122249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257897 + ... + 257943.

It is an arithmetic number, because the mean of its divisors is an integer number (257040).

Almost surely, 2^12122240 is an apocalyptic number.

12122240 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 12122240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16450560).

12122240 is an abundant number, since it is smaller than the sum of its proper divisors (20778880).

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

12122240 is a wasteful number, since it uses less digits than its factorization.

12122240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 12122240 is about 3481.7007338368. The cubic root of 12122240 is about 229.7176118450.

Adding to 12122240 its reverse (4222121), we get a palindrome (16344361).

The spelling of 12122240 in words is "twelve million, one hundred twenty-two thousand, two hundred forty".