263481 has 8 divisors (see below), whose sum is σ = 356544. Its totient is φ = 173040.

The previous prime is 263443. The next prime is 263489. The reversal of 263481 is 184362.

It is a happy number.

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

It is not a de Polignac number, because 263481 - 2¹¹ = 261433 is a prime.

It is a super-2 number, since 2×263481² = 138844474722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (263489) 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 7 ways as a sum of consecutive naturals, for example, 406 + ... + 831.

It is an arithmetic number, because the mean of its divisors is an integer number (44568).

2²⁶³⁴⁸¹ is an apocalyptic number.

It is an amenable number.

263481 is a deficient number, since it is larger than the sum of its proper divisors (93063).

263481 is a wasteful number, since it uses less digits than its factorization.

263481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311.

The product of its digits is 1152, while the sum is 24.

The square root of 263481 is about 513.3040034911. The cubic root of 263481 is about 64.1086208827.

The spelling of 263481 in words is "two hundred sixty-three thousand, four hundred eighty-one".