12205140 has 24 divisors (see below), whose sum is σ = 34174560. Its totient is φ = 3254688.

The previous prime is 12205121. The next prime is 12205159. The reversal of 12205140 is 4150221.

12205140 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12205121) and next prime (12205159).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101650 + ... + 101769.

It is an arithmetic number, because the mean of its divisors is an integer number (1423940).

Almost surely, 2^12205140 is an apocalyptic number.

12205140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12205140 is an abundant number, since it is smaller than the sum of its proper divisors (21969420).

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

12205140 is a wasteful number, since it uses less digits than its factorization.

12205140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203431 (or 203429 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 12205140 is about 3493.5855506914. The cubic root of 12205140 is about 230.2400769796.

Adding to 12205140 its reverse (4150221), we get a palindrome (16355361).

The spelling of 12205140 in words is "twelve million, two hundred five thousand, one hundred forty".