78522 has 16 divisors (see below), whose sum is σ = 164160. Its totient is φ = 24992.

The previous prime is 78517. The next prime is 78539. The reversal of 78522 is 22587.

It is a junction number, because it is equal to n+sod(n) for n = 78492 and 78501.

It is an unprimeable number.

78522 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147 + ... + 422.

It is an arithmetic number, because the mean of its divisors is an integer number (10260).

2⁷⁸⁵²² is an apocalyptic number.

78522 is an abundant number, since it is smaller than the sum of its proper divisors (85638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82080).

78522 is a wasteful number, since it uses less digits than its factorization.

78522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597.

The product of its digits is 1120, while the sum is 24.

The square root of 78522 is about 280.2177724556. The cubic root of 78522 is about 42.8216881375.

The spelling of 78522 in words is "seventy-eight thousand, five hundred twenty-two".