133278 has 16 divisors (see below), whose sum is σ = 270480. Its totient is φ = 43776.

The previous prime is 133277. The next prime is 133279. The reversal of 133278 is 872331.

It is an interprime number because it is at equal distance from previous prime (133277) and next prime (133279).

It is a d-powerful number, because it can be written as 1 + 3 + 2¹⁷ + 3⁷ + 7 + 8 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133271) 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 in 7 ways as a sum of consecutive naturals, for example, 468 + ... + 696.

It is an arithmetic number, because the mean of its divisors is an integer number (16905).

2¹³³²⁷⁸ is an apocalyptic number.

133278 is an abundant number, since it is smaller than the sum of its proper divisors (137202).

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

133278 is a wasteful number, since it uses less digits than its factorization.

133278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331.

The product of its digits is 1008, while the sum is 24.

The square root of 133278 is about 365.0725955204. The cubic root of 133278 is about 51.0802274392.

The spelling of 133278 in words is "one hundred thirty-three thousand, two hundred seventy-eight".