6425729 has 4 divisors (see below), whose sum is σ = 6433284. Its totient is φ = 6418176.

The previous prime is 6425719. The next prime is 6425737. The reversal of 6425729 is 9275246.

6425729 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 6225025 + 200704 = 2495^2 + 448^2 .

It is a cyclic number.

It is not a de Polignac number, because 6425729 - 2²⁰ = 5377153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6425719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2312 + ... + 4265.

It is an arithmetic number, because the mean of its divisors is an integer number (1608321).

Almost surely, 2^6425729 is an apocalyptic number.

It is an amenable number.

6425729 is a deficient number, since it is larger than the sum of its proper divisors (7555).

6425729 is an equidigital number, since it uses as much as digits as its factorization.

6425729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7554.

The product of its digits is 30240, while the sum is 35.

The square root of 6425729 is about 2534.9021677374. The cubic root of 6425729 is about 185.9120195152.

The spelling of 6425729 in words is "six million, four hundred twenty-five thousand, seven hundred twenty-nine".