262861 has 4 divisors (see below), whose sum is σ = 266112. Its totient is φ = 259612.

The previous prime is 262853. The next prime is 262877. The reversal of 262861 is 168262.

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: 168262 = 2 ⋅84131.

It is a cyclic number.

It is not a de Polignac number, because 262861 - 2³ = 262853 is a prime.

It is a Duffinian number.

262861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (262261) 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, 1501 + ... + 1666.

It is an arithmetic number, because the mean of its divisors is an integer number (66528).

2²⁶²⁸⁶¹ is an apocalyptic number.

It is an amenable number.

262861 is a deficient number, since it is larger than the sum of its proper divisors (3251).

262861 is an equidigital number, since it uses as much as digits as its factorization.

262861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3250.

The product of its digits is 1152, while the sum is 25.

The square root of 262861 is about 512.6997171835. The cubic root of 262861 is about 64.0582964920.

The spelling of 262861 in words is "two hundred sixty-two thousand, eight hundred sixty-one".