729455121 has 6 divisors (see below), whose sum is σ = 1053657410. Its totient is φ = 486303408.

The previous prime is 729455119. The next prime is 729455123. The reversal of 729455121 is 121554927.

729455121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (729455119) and next prime (729455123).

It can be written as a sum of positive squares in only one way, i.e., 384944400 + 344510721 = 19620^2 + 18561^2 .

It is not a de Polignac number, because 729455121 - 2¹ = 729455119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729455123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40525276 + ... + 40525293.

Almost surely, 2^729455121 is an apocalyptic number.

It is an amenable number.

729455121 is a deficient number, since it is larger than the sum of its proper divisors (324202289).

729455121 is a wasteful number, since it uses less digits than its factorization.

729455121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81050575 (or 81050572 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 729455121 is about 27008.4268516328. The cubic root of 729455121 is about 900.1872536300.

The spelling of 729455121 in words is "seven hundred twenty-nine million, four hundred fifty-five thousand, one hundred twenty-one".