7765625 has 28 divisors (see below), whose sum is σ = 11249856. Its totient is φ = 5250000.

The previous prime is 7765603. The next prime is 7765627. The reversal of 7765625 is 5265677.

It is not a de Polignac number, because 7765625 - 2¹⁴ = 7749241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7765627) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 109340 + ... + 109410.

Almost surely, 2^7765625 is an apocalyptic number.

It is an amenable number.

7765625 is a deficient number, since it is larger than the sum of its proper divisors (3484231).

7765625 is an frugal number, since it uses more digits than its factorization.

7765625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 83 counting only the distinct ones).

The product of its digits is 88200, while the sum is 38.

The square root of 7765625 is about 2786.6871012010. The cubic root of 7765625 is about 198.0274848762.

It can be divided in two parts, 7 and 765625, that multiplied together give a cube (5359375 = 175³).

The spelling of 7765625 in words is "seven million, seven hundred sixty-five thousand, six hundred twenty-five".