4247985 has 32 divisors (see below), whose sum is σ = 8110080. Its totient is φ = 1856448.

The previous prime is 4247983. The next prime is 4248017. The reversal of 4247985 is 5897424.

It is not a de Polignac number, because 4247985 - 2¹ = 4247983 is a prime.

4247985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4247981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1536 + ... + 3294.

It is an arithmetic number, because the mean of its divisors is an integer number (253440).

Almost surely, 2^4247985 is an apocalyptic number.

It is an amenable number.

4247985 is a deficient number, since it is larger than the sum of its proper divisors (3862095).

4247985 is a wasteful number, since it uses less digits than its factorization.

4247985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797.

The product of its digits is 80640, while the sum is 39.

The square root of 4247985 is about 2061.0640455842. The cubic root of 4247985 is about 161.9549867317.

The spelling of 4247985 in words is "four million, two hundred forty-seven thousand, nine hundred eighty-five".