1229378055 has 16 divisors (see below), whose sum is σ = 1967462880. Its totient is φ = 655515648.

The previous prime is 1229378047. The next prime is 1229378057. The reversal of 1229378055 is 5508739221.

It is a happy number.

It is not a de Polignac number, because 1229378055 - 2³ = 1229378047 is a prime.

It is a super-3 number, since 3×1229378055³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1229377998 and 1229378016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229378057) 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 15 ways as a sum of consecutive naturals, for example, 91659 + ... + 104211.

It is an arithmetic number, because the mean of its divisors is an integer number (122966430).

Almost surely, 2^1229378055 is an apocalyptic number.

1229378055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1229378055 is a deficient number, since it is larger than the sum of its proper divisors (738084825).

1229378055 is a wasteful number, since it uses less digits than its factorization.

1229378055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19090.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 1229378055 is about 35062.4878609605. The cubic root of 1229378055 is about 1071.2606491246.

The spelling of 1229378055 in words is "one billion, two hundred twenty-nine million, three hundred seventy-eight thousand, fifty-five".