78481 has 4 divisors (see below), whose sum is σ = 84532. Its totient is φ = 72432.

The previous prime is 78479. The next prime is 78487. The reversal of 78481 is 18487.

78481 is nontrivially palindromic in base 3.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13456 + 65025 = 116^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 78481 - 2¹ = 78479 is a prime.

It is a super-2 number, since 2×78481² = 12318534722, which contains 22 as substring.

It is a Duffinian number.

78481 is a modest number, since divided by 481 gives 78 as remainder.

It is not an unprimeable number, because it can be changed into a prime (78487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3006 + ... + 3031.

It is an arithmetic number, because the mean of its divisors is an integer number (21133).

2⁷⁸⁴⁸¹ is an apocalyptic number.

It is an amenable number.

78481 is a deficient number, since it is larger than the sum of its proper divisors (6051).

78481 is a wasteful number, since it uses less digits than its factorization.

78481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6050.

The product of its digits is 1792, while the sum is 28.

The square root of 78481 is about 280.1446055165. The cubic root of 78481 is about 42.8142337728.

It can be divided in two parts, 784 and 81, that multiplied together give a square (63504 = 252²).

The spelling of 78481 in words is "seventy-eight thousand, four hundred eighty-one".