1224205145 has 16 divisors (see below), whose sum is σ = 1481625408. Its totient is φ = 971006400.

The previous prime is 1224205133. The next prime is 1224205181. The reversal of 1224205145 is 5415024221.

It is not a de Polignac number, because 1224205145 - 2⁸ = 1224204889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427970 + ... + 430820.

It is an arithmetic number, because the mean of its divisors is an integer number (92601588).

Almost surely, 2^1224205145 is an apocalyptic number.

It is an amenable number.

1224205145 is a deficient number, since it is larger than the sum of its proper divisors (257420263).

1224205145 is a wasteful number, since it uses less digits than its factorization.

1224205145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3560.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 1224205145 is about 34988.6430860072. The cubic root of 1224205145 is about 1069.7560060306.

Adding to 1224205145 its reverse (5415024221), we get a palindrome (6639229366).

The spelling of 1224205145 in words is "one billion, two hundred twenty-four million, two hundred five thousand, one hundred forty-five".