262661 has 8 divisors (see below), whose sum is σ = 303360. Its totient is φ = 222768.

The previous prime is 262657. The next prime is 262681. The reversal of 262661 is 166262.

262661 is nontrivially palindromic in base 13.

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

It is not a de Polignac number, because 262661 - 2² = 262657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 262661.

It is not an unprimeable number, because it can be changed into a prime (262621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 980 + ... + 1218.

It is an arithmetic number, because the mean of its divisors is an integer number (37920).

2²⁶²⁶⁶¹ is an apocalyptic number.

It is an amenable number.

262661 is a deficient number, since it is larger than the sum of its proper divisors (40699).

262661 is a wasteful number, since it uses less digits than its factorization.

262661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403.

The product of its digits is 864, while the sum is 23.

The square root of 262661 is about 512.5046341254. The cubic root of 262661 is about 64.0420459388.

The spelling of 262661 in words is "two hundred sixty-two thousand, six hundred sixty-one".