7129841 has 4 divisors (see below), whose sum is σ = 7175412. Its totient is φ = 7084272.

The previous prime is 7129831. The next prime is 7129847. The reversal of 7129841 is 1489217.

7129841 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 774400 + 6355441 = 880^2 + 2521^2 .

It is a cyclic number.

It is not a de Polignac number, because 7129841 - 2¹⁰ = 7128817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7129798 and 7129807.

It is not an unprimeable number, because it can be changed into a prime (7129847) 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 3 ways as a sum of consecutive naturals, for example, 22550 + ... + 22863.

It is an arithmetic number, because the mean of its divisors is an integer number (1793853).

Almost surely, 2^7129841 is an apocalyptic number.

It is an amenable number.

7129841 is a deficient number, since it is larger than the sum of its proper divisors (45571).

7129841 is a wasteful number, since it uses less digits than its factorization.

7129841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45570.

The product of its digits is 4032, while the sum is 32.

The square root of 7129841 is about 2670.1762114138. The cubic root of 7129841 is about 192.4686270343.

It can be divided in two parts, 71 and 29841, that multiplied together give a triangular number (2118711 = T₂₀₅₈).

The spelling of 7129841 in words is "seven million, one hundred twenty-nine thousand, eight hundred forty-one".