7842985 has 8 divisors (see below), whose sum is σ = 9630720. Its totient is φ = 6128304.

The previous prime is 7842973. The next prime is 7843009. The reversal of 7842985 is 5892487.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7842985 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

7842985 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18025 + ... + 18454.

It is an arithmetic number, because the mean of its divisors is an integer number (1203840).

Almost surely, 2^7842985 is an apocalyptic number.

It is an amenable number.

7842985 is a deficient number, since it is larger than the sum of its proper divisors (1787735).

7842985 is a wasteful number, since it uses less digits than its factorization.

7842985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36527.

The product of its digits is 161280, while the sum is 43.

The square root of 7842985 is about 2800.5329849870. The cubic root of 7842985 is about 198.6828867713.

The spelling of 7842985 in words is "seven million, eight hundred forty-two thousand, nine hundred eighty-five".