8427745 has 4 divisors (see below), whose sum is σ = 10113300. Its totient is φ = 6742192.

The previous prime is 8427739. The next prime is 8427751. The reversal of 8427745 is 5477248.

8427745 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (8427739) and next prime (8427751).

It can be written as a sum of positive squares in 2 ways, for example, as 5564881 + 2862864 = 2359^2 + 1692^2 .

It is a cyclic number.

It is not a de Polignac number, because 8427745 - 2⁹ = 8427233 is a prime.

8427745 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842770 + ... + 842779.

It is an arithmetic number, because the mean of its divisors is an integer number (2528325).

Almost surely, 2^8427745 is an apocalyptic number.

It is an amenable number.

8427745 is a deficient number, since it is larger than the sum of its proper divisors (1685555).

8427745 is a wasteful number, since it uses less digits than its factorization.

8427745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685554.

The product of its digits is 62720, while the sum is 37.

The square root of 8427745 is about 2903.0578705909. The cubic root of 8427745 is about 203.5028342668.

The spelling of 8427745 in words is "eight million, four hundred twenty-seven thousand, seven hundred forty-five".