261227 has 4 divisors (see below), whose sum is σ = 262560. Its totient is φ = 259896.

The previous prime is 261223. The next prime is 261229. The reversal of 261227 is 722162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261227 - 2² = 261223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261199 and 261208.

It is not an unprimeable number, because it can be changed into a prime (261223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308 + ... + 785.

It is an arithmetic number, because the mean of its divisors is an integer number (65640).

2²⁶¹²²⁷ is an apocalyptic number.

261227 is a deficient number, since it is larger than the sum of its proper divisors (1333).

261227 is a wasteful number, since it uses less digits than its factorization.

261227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332.

The product of its digits is 336, while the sum is 20.

The square root of 261227 is about 511.1037076758. The cubic root of 261227 is about 63.9252871640.

Adding to 261227 its reverse (722162), we get a palindrome (983389).

The spelling of 261227 in words is "two hundred sixty-one thousand, two hundred twenty-seven".