78281 has 8 divisors (see below), whose sum is σ = 91584. Its totient is φ = 65520.

The previous prime is 78277. The next prime is 78283. The reversal of 78281 is 18287.

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

It is not a de Polignac number, because 78281 - 2² = 78277 is a prime.

It is a super-2 number, since 2×78281² = 12255829922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78281.

It is not an unprimeable number, because it can be changed into a prime (78283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266 + ... + 476.

It is an arithmetic number, because the mean of its divisors is an integer number (11448).

2⁷⁸²⁸¹ is an apocalyptic number.

It is an amenable number.

78281 is a deficient number, since it is larger than the sum of its proper divisors (13303).

78281 is a wasteful number, since it uses less digits than its factorization.

78281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271.

The product of its digits is 896, while the sum is 26.

The square root of 78281 is about 279.7874193026. The cubic root of 78281 is about 42.7778337487. Note that the first 3 decimals are identical.

The spelling of 78281 in words is "seventy-eight thousand, two hundred eighty-one".