1228564243 has 8 divisors (see below), whose sum is σ = 1271405520. Its totient is φ = 1186230240.

The previous prime is 1228564241. The next prime is 1228564247. The reversal of 1228564243 is 3424658221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1228564243 - 2¹ = 1228564241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228564241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121888 + ... + 131581.

It is an arithmetic number, because the mean of its divisors is an integer number (158925690).

Almost surely, 2^1228564243 is an apocalyptic number.

1228564243 is a deficient number, since it is larger than the sum of its proper divisors (42841277).

1228564243 is a wasteful number, since it uses less digits than its factorization.

1228564243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253637.

The product of its digits is 92160, while the sum is 37.

The square root of 1228564243 is about 35050.8807735269. The cubic root of 1228564243 is about 1071.0242159655.

The spelling of 1228564243 in words is "one billion, two hundred twenty-eight million, five hundred sixty-four thousand, two hundred forty-three".