278601 has 4 divisors (see below), whose sum is σ = 371472. Its totient is φ = 185732.

The previous prime is 278591. The next prime is 278609. The reversal of 278601 is 106872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 278601 - 2¹⁰ = 277577 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (278609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46431 + ... + 46436.

It is an arithmetic number, because the mean of its divisors is an integer number (92868).

2²⁷⁸⁶⁰¹ is an apocalyptic number.

It is an amenable number.

278601 is a deficient number, since it is larger than the sum of its proper divisors (92871).

278601 is an equidigital number, since it uses as much as digits as its factorization.

278601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92870.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 278601 is about 527.8266760974. The cubic root of 278601 is about 65.3121865708.

The spelling of 278601 in words is "two hundred seventy-eight thousand, six hundred one".