45178 has 12 divisors (see below), whose sum is σ = 79002. Its totient is φ = 19320.

The previous prime is 45161. The next prime is 45179. The reversal of 45178 is 87154.

45178 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 41209 + 3969 = 203^2 + 63^2 .

It is not an unprimeable number, because it can be changed into a prime (45179) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133 + ... + 328.

2⁴⁵¹⁷⁸ is an apocalyptic number.

45178 is a deficient number, since it is larger than the sum of its proper divisors (33824).

45178 is a wasteful number, since it uses less digits than its factorization.

45178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 470 counting only the distinct ones).

The product of its digits is 1120, while the sum is 25.

The square root of 45178 is about 212.5511703096. The cubic root of 45178 is about 35.6157696411.

It can be divided in two parts, 451 and 78, that added together give a square (529 = 23²).

The spelling of 45178 in words is "forty-five thousand, one hundred seventy-eight".