7245729 has 6 divisors (see below), whose sum is σ = 10466066. Its totient is φ = 4830480.

The previous prime is 7245709. The next prime is 7245739. The reversal of 7245729 is 9275427.

It can be written as a sum of positive squares in only one way, i.e., 5688225 + 1557504 = 2385^2 + 1248^2 .

It is not a de Polignac number, because 7245729 - 2¹⁶ = 7180193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7245693 and 7245702.

It is not an unprimeable number, because it can be changed into a prime (7245709) 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 5 ways as a sum of consecutive naturals, for example, 402532 + ... + 402549.

Almost surely, 2^7245729 is an apocalyptic number.

It is an amenable number.

7245729 is a deficient number, since it is larger than the sum of its proper divisors (3220337).

7245729 is a wasteful number, since it uses less digits than its factorization.

7245729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805087 (or 805084 counting only the distinct ones).

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

The square root of 7245729 is about 2691.7891819383. The cubic root of 7245729 is about 193.5058187862.

The spelling of 7245729 in words is "seven million, two hundred forty-five thousand, seven hundred twenty-nine".