12123340 has 24 divisors (see below), whose sum is σ = 25784640. Its totient is φ = 4787328.

The previous prime is 12123317. The next prime is 12123341. The reversal of 12123340 is 4332121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12123341) 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, 2257 + ... + 5416.

It is an arithmetic number, because the mean of its divisors is an integer number (1074360).

Almost surely, 2^12123340 is an apocalyptic number.

12123340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12123340 is an abundant number, since it is smaller than the sum of its proper divisors (13661300).

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

12123340 is a wasteful number, since it uses less digits than its factorization.

12123340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7761 (or 7759 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 12123340 is about 3481.8586990284. The cubic root of 12123340 is about 229.7245600034.

Adding to 12123340 its reverse (4332121), we get a palindrome (16455461).

The spelling of 12123340 in words is "twelve million, one hundred twenty-three thousand, three hundred forty".