8742705 has 16 divisors (see below), whose sum is σ = 14287104. Its totient is φ = 4563200.

The previous prime is 8742689. The next prime is 8742739. The reversal of 8742705 is 5072478.

It is not a de Polignac number, because 8742705 - 2⁴ = 8742689 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5496 + ... + 6905.

It is an arithmetic number, because the mean of its divisors is an integer number (892944).

Almost surely, 2^8742705 is an apocalyptic number.

It is an amenable number.

8742705 is a deficient number, since it is larger than the sum of its proper divisors (5544399).

8742705 is a wasteful number, since it uses less digits than its factorization.

8742705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12456.

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 8742705 is about 2956.8065543759. The cubic root of 8742705 is about 206.0069828280.

The spelling of 8742705 in words is "eight million, seven hundred forty-two thousand, seven hundred five".