12213542 has 32 divisors (see below), whose sum is σ = 21427200. Its totient is φ = 5162400.

The previous prime is 12213541. The next prime is 12213571. The reversal of 12213542 is 24531221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25259 + ... + 25737.

It is an arithmetic number, because the mean of its divisors is an integer number (669600).

Almost surely, 2^12213542 is an apocalyptic number.

12213542 is a deficient number, since it is larger than the sum of its proper divisors (9213658).

12213542 is a wasteful number, since it uses less digits than its factorization.

12213542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572.

The product of its digits is 480, while the sum is 20.

The square root of 12213542 is about 3494.7878333312. The cubic root of 12213542 is about 230.2928971685.

Adding to 12213542 its reverse (24531221), we get a palindrome (36744763).

The spelling of 12213542 in words is "twelve million, two hundred thirteen thousand, five hundred forty-two".