262581 has 16 divisors (see below), whose sum is σ = 390720. Its totient is φ = 155520.

The previous prime is 262567. The next prime is 262583. The reversal of 262581 is 185262.

It is not a de Polignac number, because 262581 - 2⁹ = 262069 is a prime.

It is a super-2 number, since 2×262581² = 137897563122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (262583) 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 15 ways as a sum of consecutive naturals, for example, 2355 + ... + 2463.

It is an arithmetic number, because the mean of its divisors is an integer number (24420).

2²⁶²⁵⁸¹ is an apocalyptic number.

It is an amenable number.

262581 is a deficient number, since it is larger than the sum of its proper divisors (128139).

262581 is a wasteful number, since it uses less digits than its factorization.

262581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196.

The product of its digits is 960, while the sum is 24.

The square root of 262581 is about 512.4265801068. The cubic root of 262581 is about 64.0355434078.

The spelling of 262581 in words is "two hundred sixty-two thousand, five hundred eighty-one".