7681345 has 8 divisors (see below), whose sum is σ = 10534464. Its totient is φ = 5267184.

The previous prime is 7681337. The next prime is 7681357. The reversal of 7681345 is 5431867.

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

It is a cyclic number.

It is not a de Polignac number, because 7681345 - 2³ = 7681337 is a prime.

It is a super-2 number, since 2×7681345² = 118006122018050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7681345.

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 7 ways as a sum of consecutive naturals, for example, 109699 + ... + 109768.

It is an arithmetic number, because the mean of its divisors is an integer number (1316808).

Almost surely, 2^7681345 is an apocalyptic number.

It is an amenable number.

7681345 is a deficient number, since it is larger than the sum of its proper divisors (2853119).

7681345 is a wasteful number, since it uses less digits than its factorization.

7681345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219479.

The product of its digits is 20160, while the sum is 34.

The square root of 7681345 is about 2771.5239490215. The cubic root of 7681345 is about 197.3084828271.

The spelling of 7681345 in words is "seven million, six hundred eighty-one thousand, three hundred forty-five".