78725 has 12 divisors (see below), whose sum is σ = 101184. Its totient is φ = 60720.

The previous prime is 78721. The next prime is 78737. The reversal of 78725 is 52787.

It is not a de Polignac number, because 78725 - 2² = 78721 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 7 + 8³ + 7² + 2⁵ + 5⁷ .

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

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1142 + ... + 1208.

It is an arithmetic number, because the mean of its divisors is an integer number (8432).

2⁷⁸⁷²⁵ is an apocalyptic number.

It is an amenable number.

78725 is a deficient number, since it is larger than the sum of its proper divisors (22459).

78725 is a wasteful number, since it uses less digits than its factorization.

78725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 119 counting only the distinct ones).

The product of its digits is 3920, while the sum is 29.

The square root of 78725 is about 280.5797569320. The cubic root of 78725 is about 42.8585581543.

It can be divided in two parts, 7 and 8725, that multiplied together give a triangular number (61075 = T₃₄₉).

The spelling of 78725 in words is "seventy-eight thousand, seven hundred twenty-five".