12216572 has 12 divisors (see below), whose sum is σ = 21405216. Its totient is φ = 6100800.

The previous prime is 12216559. The next prime is 12216577. The reversal of 12216572 is 27561221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3533 + ... + 6075.

It is an arithmetic number, because the mean of its divisors is an integer number (1783768).

Almost surely, 2^12216572 is an apocalyptic number.

It is an amenable number.

12216572 is a deficient number, since it is larger than the sum of its proper divisors (9188644).

12216572 is a wasteful number, since it uses less digits than its factorization.

12216572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3748 (or 3746 counting only the distinct ones).

The product of its digits is 1680, while the sum is 26.

The square root of 12216572 is about 3495.2213091591. The cubic root of 12216572 is about 230.3119396865.

Adding to 12216572 its reverse (27561221), we get a palindrome (39777793).

The spelling of 12216572 in words is "twelve million, two hundred sixteen thousand, five hundred seventy-two".