12245640 has 64 divisors (see below), whose sum is σ = 40080960. Its totient is φ = 2968320.

The previous prime is 12245621. The next prime is 12245641. The reversal of 12245640 is 4654221.

12245640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12245640.

It is not an unprimeable number, because it can be changed into a prime (12245641) 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, 3319 + ... + 5958.

It is an arithmetic number, because the mean of its divisors is an integer number (626265).

Almost surely, 2^12245640 is an apocalyptic number.

12245640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12245640 is an abundant number, since it is smaller than the sum of its proper divisors (27835320).

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

12245640 is a wasteful number, since it uses less digits than its factorization.

12245640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9302 (or 9298 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 12245640 is about 3499.3770874257. The cubic root of 12245640 is about 230.4944623750.

Adding to 12245640 its reverse (4654221), we get a palindrome (16899861).

The spelling of 12245640 in words is "twelve million, two hundred forty-five thousand, six hundred forty".