78124 has 6 divisors (see below), whose sum is σ = 136724. Its totient is φ = 39060.

The previous prime is 78121. The next prime is 78137. The reversal of 78124 is 42187.

78124 is nontrivially palindromic in base 5.

It is a Cunningham number, because it is equal to 5⁷-1.

It is a super-2 number, since 2×78124² = 12206718752, which contains 22 as substring.

78124 is a nontrivial repdigit in base 5.

It is a plaindrome in base 5.

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 78095 and 78104.

It is not an unprimeable number, because it can be changed into a prime (78121) 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 as a sum of consecutive naturals, namely, 9762 + ... + 9769.

2⁷⁸¹²⁴ is an apocalyptic number.

It is an amenable number.

78124 is a deficient number, since it is larger than the sum of its proper divisors (58600).

78124 is a wasteful number, since it uses less digits than its factorization.

78124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19535 (or 19533 counting only the distinct ones).

The product of its digits is 448, while the sum is 22.

The square root of 78124 is about 279.5067083274. The cubic root of 78124 is about 42.7492162687.

Subtracting from 78124 its reverse (42187), we obtain a cube (35937 = 33³).

It can be divided in two parts, 78 and 124, that added together give a palindrome (202).

The spelling of 78124 in words is "seventy-eight thousand, one hundred twenty-four".