7678725 has 24 divisors (see below), whose sum is σ = 12996192. Its totient is φ = 3998400.

The previous prime is 7678709. The next prime is 7678733. The reversal of 7678725 is 5278767.

It is not a de Polignac number, because 7678725 - 2⁴ = 7678709 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 2035 + ... + 4415.

It is an arithmetic number, because the mean of its divisors is an integer number (541508).

Almost surely, 2^7678725 is an apocalyptic number.

7678725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7678725 is a deficient number, since it is larger than the sum of its proper divisors (5317467).

7678725 is a wasteful number, since it uses less digits than its factorization.

7678725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437 (or 2432 counting only the distinct ones).

The product of its digits is 164640, while the sum is 42.

The square root of 7678725 is about 2771.0512445641. The cubic root of 7678725 is about 197.2860472158.

Adding to 7678725 its sum of digits (42), we get a palindrome (7678767).

The spelling of 7678725 in words is "seven million, six hundred seventy-eight thousand, seven hundred twenty-five".