1228512289 has 4 divisors (see below), whose sum is σ = 1229669056. Its totient is φ = 1227355524.

The previous prime is 1228512253. The next prime is 1228512319. The reversal of 1228512289 is 9822158221.

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.

It is a cyclic number.

It is not a de Polignac number, because 1228512289 - 2¹³ = 1228504097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228512589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576789 + ... + 578914.

It is an arithmetic number, because the mean of its divisors is an integer number (307417264).

Almost surely, 2^1228512289 is an apocalyptic number.

It is an amenable number.

1228512289 is a deficient number, since it is larger than the sum of its proper divisors (1156767).

1228512289 is a wasteful number, since it uses less digits than its factorization.

1228512289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156766.

The product of its digits is 46080, while the sum is 40.

The square root of 1228512289 is about 35050.1396430884. The cubic root of 1228512289 is about 1071.0091184572.

The spelling of 1228512289 in words is "one billion, two hundred twenty-eight million, five hundred twelve thousand, two hundred eighty-nine".