12215432 has 8 divisors (see below), whose sum is σ = 22903950. Its totient is φ = 6107712.

The previous prime is 12215429. The next prime is 12215449. The reversal of 12215432 is 23451221.

It can be written as a sum of positive squares in only one way, i.e., 12208036 + 7396 = 3494^2 + 86^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 763457 + ... + 763472.

Almost surely, 2^12215432 is an apocalyptic number.

It is an amenable number.

12215432 is a deficient number, since it is larger than the sum of its proper divisors (10688518).

12215432 is a wasteful number, since it uses less digits than its factorization.

12215432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526935 (or 1526931 counting only the distinct ones).

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

The square root of 12215432 is about 3495.0582255522. The cubic root of 12215432 is about 230.3047755443.

Adding to 12215432 its reverse (23451221), we get a palindrome (35666653).

The spelling of 12215432 in words is "twelve million, two hundred fifteen thousand, four hundred thirty-two".