1228419547 has 4 divisors (see below), whose sum is σ = 1268046016. Its totient is φ = 1188793080.

The previous prime is 1228419529. The next prime is 1228419551. The reversal of 1228419547 is 7459148221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1228419547 - 2¹¹ = 1228417499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228419557) 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, 19813188 + ... + 19813249.

It is an arithmetic number, because the mean of its divisors is an integer number (317011504).

Almost surely, 2^1228419547 is an apocalyptic number.

1228419547 is a deficient number, since it is larger than the sum of its proper divisors (39626469).

1228419547 is an equidigital number, since it uses as much as digits as its factorization.

1228419547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39626468.

The product of its digits is 161280, while the sum is 43.

The square root of 1228419547 is about 35048.8166276695. The cubic root of 1228419547 is about 1070.9821671525.

The spelling of 1228419547 in words is "one billion, two hundred twenty-eight million, four hundred nineteen thousand, five hundred forty-seven".