278201 has 8 divisors (see below), whose sum is σ = 346944. Its totient is φ = 216720.

The previous prime is 278191. The next prime is 278207. The reversal of 278201 is 102872.

278201 = T₁₁₃ + T₁₁₄ + ... + T₁₄₅.

278201 = 154² + 155² + ... + 164².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 278201 - 2¹⁰ = 277177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (278207) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1730 + ... + 1883.

It is an arithmetic number, because the mean of its divisors is an integer number (43368).

2²⁷⁸²⁰¹ is an apocalyptic number.

It is an amenable number.

278201 is a deficient number, since it is larger than the sum of its proper divisors (68743).

278201 is a wasteful number, since it uses less digits than its factorization.

278201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3631.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 278201 is about 527.4476277319. The cubic root of 278201 is about 65.2809143841.

It can be divided in two parts, 27 and 8201, that added together give a palindrome (8228).

The spelling of 278201 in words is "two hundred seventy-eight thousand, two hundred one".