1224205361 has 4 divisors (see below), whose sum is σ = 1225316352. Its totient is φ = 1223094372.

The previous prime is 1224205319. The next prime is 1224205427. The reversal of 1224205361 is 1635024221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1635024221 = 83 ⋅19699087.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224205361 is a prime.

It is a super-2 number, since 2×1224205361² = 2997357531802280642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1224205361.

It is not an unprimeable number, because it can be changed into a prime (1224204361) 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, 553841 + ... + 556046.

It is an arithmetic number, because the mean of its divisors is an integer number (306329088).

Almost surely, 2^1224205361 is an apocalyptic number.

It is an amenable number.

1224205361 is a deficient number, since it is larger than the sum of its proper divisors (1110991).

1224205361 is a wasteful number, since it uses less digits than its factorization.

1224205361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110990.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1224205361 is about 34988.6461727229. The cubic root of 1224205361 is about 1069.7560689469.

Adding to 1224205361 its reverse (1635024221), we get a palindrome (2859229582).

The spelling of 1224205361 in words is "one billion, two hundred twenty-four million, two hundred five thousand, three hundred sixty-one".