8742729 has 8 divisors (see below), whose sum is σ = 11674432. Its totient is φ = 5819760.

The previous prime is 8742689. The next prime is 8742739. The reversal of 8742729 is 9272478.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8742729 - 2¹¹ = 8740681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8742739) 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, 699 + ... + 4239.

It is an arithmetic number, because the mean of its divisors is an integer number (1459304).

Almost surely, 2^8742729 is an apocalyptic number.

It is an amenable number.

8742729 is a deficient number, since it is larger than the sum of its proper divisors (2931703).

8742729 is a wasteful number, since it uses less digits than its factorization.

8742729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4367.

The product of its digits is 56448, while the sum is 39.

The square root of 8742729 is about 2956.8106128056. The cubic root of 8742729 is about 206.0071713342.

The spelling of 8742729 in words is "eight million, seven hundred forty-two thousand, seven hundred twenty-nine".