7681285 has 4 divisors (see below), whose sum is σ = 9217548. Its totient is φ = 6145024.

The previous prime is 7681283. The next prime is 7681307. The reversal of 7681285 is 5821867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5821867 = 229 ⋅25423.

It can be written as a sum of positive squares in 2 ways, for example, as 2455489 + 5225796 = 1567^2 + 2286^2 .

It is a cyclic number.

It is not a de Polignac number, because 7681285 - 2¹ = 7681283 is a prime.

It is a Duffinian number.

7681285 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7681283) by changing a digit.

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, 768124 + ... + 768133.

It is an arithmetic number, because the mean of its divisors is an integer number (2304387).

Almost surely, 2^7681285 is an apocalyptic number.

It is an amenable number.

7681285 is a deficient number, since it is larger than the sum of its proper divisors (1536263).

7681285 is a wasteful number, since it uses less digits than its factorization.

7681285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536262.

The product of its digits is 26880, while the sum is 37.

The square root of 7681285 is about 2771.5131246307. The cubic root of 7681285 is about 197.3079690915.

The spelling of 7681285 in words is "seven million, six hundred eighty-one thousand, two hundred eighty-five".