278134 has 4 divisors (see below), whose sum is σ = 417204. Its totient is φ = 139066.

The previous prime is 278123. The next prime is 278143. The reversal of 278134 is 431872.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 278099 and 278108.

It is a congruent number.

It is an unprimeable number.

278134 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69532 + ... + 69535.

It is an arithmetic number, because the mean of its divisors is an integer number (104301).

2²⁷⁸¹³⁴ is an apocalyptic number.

278134 is a deficient number, since it is larger than the sum of its proper divisors (139070).

278134 is a wasteful number, since it uses less digits than its factorization.

278134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139069.

The product of its digits is 1344, while the sum is 25.

The square root of 278134 is about 527.3841104925. The cubic root of 278134 is about 65.2756733624.

The spelling of 278134 in words is "two hundred seventy-eight thousand, one hundred thirty-four".