1227768421 has 8 divisors (see below), whose sum is σ = 1342440000. Its totient is φ = 1113606240.

The previous prime is 1227768349. The next prime is 1227768427. The reversal of 1227768421 is 1248677221.

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 1227768421 - 2⁹ = 1227767909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227768427) 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 7 ways as a sum of consecutive naturals, for example, 122296 + ... + 131953.

It is an arithmetic number, because the mean of its divisors is an integer number (167805000).

Almost surely, 2^1227768421 is an apocalyptic number.

1227768421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1227768421 is a deficient number, since it is larger than the sum of its proper divisors (114671579).

1227768421 is a wasteful number, since it uses less digits than its factorization.

1227768421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254699.

The product of its digits is 75264, while the sum is 40.

The square root of 1227768421 is about 35039.5265521668. The cubic root of 1227768421 is about 1070.7929083654.

The spelling of 1227768421 in words is "one billion, two hundred twenty-seven million, seven hundred sixty-eight thousand, four hundred twenty-one".