1038721105 has 8 divisors (see below), whose sum is σ = 1259316072. Its totient is φ = 822409728.

The previous prime is 1038721087. The next prime is 1038721121. The reversal of 1038721105 is 5011278301.

1038721105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 16192576 + 1022528529 = 4024^2 + 31977^2 .

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 1038721105 - 2²¹ = 1036623953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070362 + ... + 1071331.

It is an arithmetic number, because the mean of its divisors is an integer number (157414509).

Almost surely, 2^1038721105 is an apocalyptic number.

It is an amenable number.

1038721105 is a deficient number, since it is larger than the sum of its proper divisors (220594967).

1038721105 is an equidigital number, since it uses as much as digits as its factorization.

1038721105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141795.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 1038721105 is about 32229.1964684197. The cubic root of 1038721105 is about 1012.7439371602.

Adding to 1038721105 its reverse (5011278301), we get a palindrome (6049999406).

The spelling of 1038721105 in words is "one billion, thirty-eight million, seven hundred twenty-one thousand, one hundred five".