12205542 has 8 divisors (see below), whose sum is σ = 24411096. Its totient is φ = 4068512.

The previous prime is 12205511. The next prime is 12205553. The reversal of 12205542 is 24550221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

12205542 is an admirable number.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1017123 + ... + 1017134.

It is an arithmetic number, because the mean of its divisors is an integer number (3051387).

Almost surely, 2^12205542 is an apocalyptic number.

12205542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12205542 is a wasteful number, since it uses less digits than its factorization.

12205542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034262.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 12205542 is about 3493.6430842317. The cubic root of 12205542 is about 230.2426047533.

Adding to 12205542 its reverse (24550221), we get a palindrome (36755763).

The spelling of 12205542 in words is "twelve million, two hundred five thousand, five hundred forty-two".