12161224 has 8 divisors (see below), whose sum is σ = 22802310. Its totient is φ = 6080608.

The previous prime is 12161213. The next prime is 12161251. The reversal of 12161224 is 42216121.

It can be written as a sum of positive squares in only one way, i.e., 11492100 + 669124 = 3390^2 + 818^2 .

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

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760069 + ... + 760084.

Almost surely, 2^12161224 is an apocalyptic number.

It is an amenable number.

12161224 is a deficient number, since it is larger than the sum of its proper divisors (10641086).

12161224 is a wasteful number, since it uses less digits than its factorization.

12161224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520159 (or 1520155 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 12161224 is about 3487.2946534527. The cubic root of 12161224 is about 229.9635985240.

Adding to 12161224 its reverse (42216121), we get a palindrome (54377345).

The spelling of 12161224 in words is "twelve million, one hundred sixty-one thousand, two hundred twenty-four".