12122740 has 48 divisors (see below), whose sum is σ = 29361024. Its totient is φ = 4118400.

The previous prime is 12122723. The next prime is 12122807. The reversal of 12122740 is 4722121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18010 + ... + 18670.

It is an arithmetic number, because the mean of its divisors is an integer number (611688).

Almost surely, 2^12122740 is an apocalyptic number.

12122740 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 12122740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14680512).

12122740 is an abundant number, since it is smaller than the sum of its proper divisors (17238284).

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

12122740 is a wasteful number, since it uses less digits than its factorization.

12122740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12122740 is about 3481.7725370851. The cubic root of 12122740 is about 229.7207701509.

Adding to 12122740 its reverse (4722121), we get a palindrome (16844861).

The spelling of 12122740 in words is "twelve million, one hundred twenty-two thousand, seven hundred forty".