78675 has 12 divisors (see below), whose sum is σ = 130200. Its totient is φ = 41920.

The previous prime is 78653. The next prime is 78691. The reversal of 78675 is 57687.

It is not a de Polignac number, because 78675 - 2⁵ = 78643 is a prime.

It is an Ulam number.

78675 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 450 + ... + 599.

It is an arithmetic number, because the mean of its divisors is an integer number (10850).

2⁷⁸⁶⁷⁵ is an apocalyptic number.

78675 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78675 is a deficient number, since it is larger than the sum of its proper divisors (51525).

78675 is a wasteful number, since it uses less digits than its factorization.

78675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062 (or 1057 counting only the distinct ones).

The product of its digits is 11760, while the sum is 33.

The square root of 78675 is about 280.4906415551. The cubic root of 78675 is about 42.8494827579.

It can be divided in two parts, 786 and 75, that added together give a triangular number (861 = T₄₁).

The spelling of 78675 in words is "seventy-eight thousand, six hundred seventy-five".