8742005 has 4 divisors (see below), whose sum is σ = 10490412. Its totient is φ = 6993600.

The previous prime is 8741989. The next prime is 8742011. The reversal of 8742005 is 5002478.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4490161 + 4251844 = 2119^2 + 2062^2 .

It is not a de Polignac number, because 8742005 - 2⁴ = 8741989 is a prime.

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 874196 + ... + 874205.

It is an arithmetic number, because the mean of its divisors is an integer number (2622603).

Almost surely, 2^8742005 is an apocalyptic number.

It is an amenable number.

8742005 is a deficient number, since it is larger than the sum of its proper divisors (1748407).

8742005 is a wasteful number, since it uses less digits than its factorization.

8742005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748406.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 8742005 is about 2956.6881810566. The cubic root of 8742005 is about 206.0014845779.

The spelling of 8742005 in words is "eight million, seven hundred forty-two thousand, five".