263485 has 4 divisors (see below), whose sum is σ = 316188. Its totient is φ = 210784.

The previous prime is 263443. The next prime is 263489. The reversal of 263485 is 584362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 584362 = 2 ⋅292181.

It can be written as a sum of positive squares in 2 ways, for example, as 195364 + 68121 = 442^2 + 261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263485 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26344 + ... + 26353.

It is an arithmetic number, because the mean of its divisors is an integer number (79047).

2²⁶³⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

263485 is a deficient number, since it is larger than the sum of its proper divisors (52703).

263485 is an equidigital number, since it uses as much as digits as its factorization.

263485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52702.

The product of its digits is 5760, while the sum is 28.

The square root of 263485 is about 513.3078998028. The cubic root of 263485 is about 64.1089452998.

The spelling of 263485 in words is "two hundred sixty-three thousand, four hundred eighty-five".