77925 has 12 divisors (see below), whose sum is σ = 128960. Its totient is φ = 41520.

The previous prime is 77899. The next prime is 77929. The reversal of 77925 is 52977.

It is a happy number.

It is not a de Polignac number, because 77925 - 2⁵ = 77893 is a prime.

It is a Curzon number.

It is a nialpdrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 77892 and 77901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 445 + ... + 594.

2⁷⁷⁹²⁵ is an apocalyptic number.

77925 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77925 is a deficient number, since it is larger than the sum of its proper divisors (51035).

77925 is a wasteful number, since it uses less digits than its factorization.

77925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052 (or 1047 counting only the distinct ones).

The product of its digits is 4410, while the sum is 30.

The square root of 77925 is about 279.1504970442. The cubic root of 77925 is about 42.7128880065.

The spelling of 77925 in words is "seventy-seven thousand, nine hundred twenty-five".