7425729 has 8 divisors (see below), whose sum is σ = 11001120. Its totient is φ = 4950468.

The previous prime is 7425721. The next prime is 7425731. The reversal of 7425729 is 9275247.

7425729 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7425729 - 2³ = 7425721 is a prime.

7425729 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7425693 and 7425702.

It is not an unprimeable number, because it can be changed into a prime (7425721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137487 + ... + 137540.

It is an arithmetic number, because the mean of its divisors is an integer number (1375140).

Almost surely, 2^7425729 is an apocalyptic number.

It is an amenable number.

7425729 is a deficient number, since it is larger than the sum of its proper divisors (3575391).

7425729 is a wasteful number, since it uses less digits than its factorization.

7425729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275036 (or 275030 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 7425729 is about 2725.0190825020. The cubic root of 7425729 is about 195.0951015404.

The spelling of 7425729 in words is "seven million, four hundred twenty-five thousand, seven hundred twenty-nine".