978281 has 4 divisors (see below), whose sum is σ = 986112. Its totient is φ = 970452.

The previous prime is 978277. The next prime is 978283. The reversal of 978281 is 182879.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 182879 = 43 ⋅4253.

It is a cyclic number.

It is not a de Polignac number, because 978281 - 2² = 978277 is a prime.

It is a super-2 number, since 2×978281² = 1914067429922, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978281.

It is not an unprimeable number, because it can be changed into a prime (978283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3725 + ... + 3978.

It is an arithmetic number, because the mean of its divisors is an integer number (246528).

2⁹⁷⁸²⁸¹ is an apocalyptic number.

It is an amenable number.

978281 is a deficient number, since it is larger than the sum of its proper divisors (7831).

978281 is a wasteful number, since it uses less digits than its factorization.

978281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7830.

The product of its digits is 8064, while the sum is 35.

The square root of 978281 is about 989.0808864800. The cubic root of 978281 is about 99.2707278836.

The spelling of 978281 in words is "nine hundred seventy-eight thousand, two hundred eighty-one".