7282729 has 4 divisors (see below), whose sum is σ = 7402180. Its totient is φ = 7163280.

The previous prime is 7282679. The next prime is 7282739. The reversal of 7282729 is 9272827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9272827 = 53 ⋅174959.

It can be written as a sum of positive squares in 2 ways, for example, as 1392400 + 5890329 = 1180^2 + 2427^2 .

It is a cyclic number.

It is not a de Polignac number, because 7282729 - 2⁷ = 7282601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7282739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59634 + ... + 59755.

It is an arithmetic number, because the mean of its divisors is an integer number (1850545).

Almost surely, 2^7282729 is an apocalyptic number.

It is an amenable number.

7282729 is a deficient number, since it is larger than the sum of its proper divisors (119451).

7282729 is a wasteful number, since it uses less digits than its factorization.

7282729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119450.

The product of its digits is 28224, while the sum is 37.

The square root of 7282729 is about 2698.6531826079. The cubic root of 7282729 is about 193.8346360718.

The spelling of 7282729 in words is "seven million, two hundred eighty-two thousand, seven hundred twenty-nine".