1224205245 has 80 divisors (see below), whose sum is σ = 2410784640. Its totient is φ = 591566976.

The previous prime is 1224205223. The next prime is 1224205253. The reversal of 1224205245 is 5425024221.

It is not a de Polignac number, because 1224205245 - 2⁶ = 1224205181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 173527 + ... + 180443.

It is an arithmetic number, because the mean of its divisors is an integer number (30134808).

Almost surely, 2^1224205245 is an apocalyptic number.

1224205245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1224205245 is a deficient number, since it is larger than the sum of its proper divisors (1186579395).

1224205245 is a wasteful number, since it uses less digits than its factorization.

1224205245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6976 (or 6967 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 1224205245 is about 34988.6445150423. The cubic root of 1224205245 is about 1069.7560351585.

Adding to 1224205245 its reverse (5425024221), we get a palindrome (6649229466).

The spelling of 1224205245 in words is "one billion, two hundred twenty-four million, two hundred five thousand, two hundred forty-five".