7681925 has 6 divisors (see below), whose sum is σ = 9525618. Its totient is φ = 6145520.

The previous prime is 7681889. The next prime is 7681937. The reversal of 7681925 is 5291867.

It can be written as a sum of positive squares in 3 ways, for example, as 2515396 + 5166529 = 1586^2 + 2273^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7681925 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 153614 + ... + 153663.

It is an arithmetic number, because the mean of its divisors is an integer number (1587603).

Almost surely, 2^7681925 is an apocalyptic number.

It is an amenable number.

7681925 is a deficient number, since it is larger than the sum of its proper divisors (1843693).

7681925 is a wasteful number, since it uses less digits than its factorization.

7681925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307287 (or 307282 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 7681925 is about 2771.6285826207. The cubic root of 7681925 is about 197.3134487994.

The spelling of 7681925 in words is "seven million, six hundred eighty-one thousand, nine hundred twenty-five".