4121390729 has 8 divisors (see below), whose sum is σ = 4168937160. Its totient is φ = 4073872000.

The previous prime is 4121390683. The next prime is 4121390731. The reversal of 4121390729 is 9270931214.

It can be written as a sum of positive squares in 4 ways, for example, as 356341129 + 3765049600 = 18877^2 + 61360^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4121390729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4121390692 and 4121390701.

It is not an unprimeable number, because it can be changed into a prime (4121990729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517679 + ... + 525579.

It is an arithmetic number, because the mean of its divisors is an integer number (521117145).

Almost surely, 2^4121390729 is an apocalyptic number.

It is an amenable number.

4121390729 is a deficient number, since it is larger than the sum of its proper divisors (47546431).

4121390729 is an equidigital number, since it uses as much as digits as its factorization.

4121390729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13851.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 4121390729 is about 64198.0586077180. The cubic root of 4121390729 is about 1603.2992765628.

The spelling of 4121390729 in words is "four billion, one hundred twenty-one million, three hundred ninety thousand, seven hundred twenty-nine".